I would expect the "Browse all" button to be available regardless of editor. This is from the inline block inserter, running trunk. | Site Editor | Post Editor | | ------------- | ------------- | |<img width="665" alt="CleanShot 2023-07-11 at 14 22 36" src="https://github.com/WordPress/gutenberg/assets/1813435/b7f29aa7-9da7-41eb-b2a0-94ccb888b42e">|<img width="607" alt="CleanShot 2023-07-11 at 14 22 57" src="https://github.com/WordPress/gutenberg/assets/1813435/f99ab0f3-fa08-47df-be12-caabb45fef75">|