I think this is because you're working on a "local" dataset. Only after finalizing the dataset closes up. Can you describe your scenario and what was your expected behavior?

Hi OutrageousSheep60 , how did you add external links to a dataset? Can you provide a snippet?

Ok - I can see that if I ran finalize(auto_upload=True) on the dataset - I get all the information in the UI.
Way is this necessary?

We have assets in a GCP bucket.
The dataset is created and then the assets are linked to the dataset via the add_external_files method