just to give an idea about the scale of the problem on my side.

These are the submodules...

`Fetching submodule lvgl_ui_generator
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Fetching submodule lvgl_ui_generator/lv_drivers
Fetching submodule lvgl_ui_generator/lvgl
Fetching submodule lvgl_ui_generator_v2
Fetching submodule lvgl_ui_generator_v2/lv_micropython
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/asf4
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Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/axtls
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/berkeley-db-1.xx
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/btstack
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/cyw43-driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/fsp
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/libffi
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/libhydrogen
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/lv_bindings
2024-04-27 20:45:45
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/lv_bindings/lvgl
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/lv_bindings/pycparser
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/lwip
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/mbedtls
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/micropython-lib
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/mynewt-nimble
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/nrfx
2024-04-27 20:45:51
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/nxp_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/btstack
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/cyw43-driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/lwip
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/mbedtls
2024-04-27 20:45:57
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/allwinner
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/bridgetek/ft9xx/ft90x-sdk
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/broadcom
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/broadcom/firmware.wiki
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/gd/nuclei-sdk
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/infineon/mtb-xmclib-cat3
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/microchip
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/mindmotion/mm32sdk
2024-04-27 20:46:03
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/nordic/nrfx
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/nuvoton
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/nxp/lpcopen
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/nxp/mcux-sdk
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/nxp/nxp_sdk
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/raspberry_pi/Pico-PIO-USB
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/renesas/rx
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/silabs/cmsis-dfp-efm32gg12b
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/sony/cxd56/spresense-exported-sdk
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_f0
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_f1
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_f2
2024-04-27 20:46:09
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_f3
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_f4
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_f7
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_g0
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_g4
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_h7
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_l0
2024-04-27 20:46:15
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_l1
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_l4
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_l5
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_u5
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/cmsis_device_wb
2024-04-27 20:46:20
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32f0xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32f1xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32f2xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32f3xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32f4xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32f7xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32g0xx_hal_driver
2024-04-27 20:46:26
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32g4xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32h7xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32l0xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32l1xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32l4xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32l5xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32u5xx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/st/stm32wbxx_hal_driver
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/ti
2024-04-27 20:46:32
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/hw/mcu/wch/ch32v307
Fetching submodule lvgl_ui_generator_v2/lv_micropython/lib/pico-sdk/lib/tinyusb/lib/CMSIS_5
... the list continues ...

Can't I adjust the environment passed to the task, so that it only includes the main repository without the submodules?