Is there a way to modify the owner of the folder on the Documents module of the Modern UX?
The Modern > Project > Documents module is the equivalent of the Classic > Project > Collaboration tab.
Changing the owner from the classic updates the Modern, but not vice versa.
To change the owner, go to Classic > Project instance > Collaboration tab > click on Actions > Properties
Change the owner. Click Save and Return button.
The Modern does not allow the owner to be changed.