Details
Users aren’t able to see more than 10k spaces and they can’t see Dremio subfolders.
Cause
This is a limit of PowerBI Navigator and not an issue with Dremio.
Workaround
Please see the Microsoft article 10,000 Object limitation workaround.
An alternative would be for the user to navigate to the table/view in the Dremio UI and then export the PBIDS file so that PowerBI can open the object directly.