My DJI FPV Combo has software 01.02.00.00 on Aircraft, Remote and, GogglesI tried to upgrade it by starting up all, then connecting goggles USB-C to the computer.  : storage shows up, no response from DJI Assistant 2 - and no error in device manager.

Then I started DJI Fly (Android) - connected Goggles to the phone using OTG adapter,  and again: no offer to upgrade/display any data or so.

How can I upgrade?

You've probably sorted this out by now but for anyone else that has this issue one thing to check is that the OTG cable is plugged into the goggles, not the phone.

Yes, that was my issue, forgot to update the thread. thank you.