Internet sharing from Macbook to iPad Pro via usb cable (Tethered caching) not working on Catalia 10.15.6
I just realized that the iPad was not showing in the Finder. I rebooted the iPad, now it shows in the finder and the connection started working.
I suppose then that it is/was a problem with the connection between the two devices, rather then the tethering itself. I will monitor the behaviour in the next days.