Documentation:

https://doc.qt.io/qtdesignstudio/studio-exporting-and-importing.html

mentions:

"Optionally, export your components back into the metadata format that you can import back into the design tool by using Qt Bridge. You can continue to iterate your design this way until it is ready.

"

and "If you want to make further changes to your components in the design tool, you can export the UI files back into the metadata format, which you can then import back into the design tool by using Qt Bridge. "

Which is not correct.

This documentation should be updated regarding import options.