Hello everyone, I'm a little late to the party, but for quite some time now, Google has been phasing out its own software packages for its own hardware [1]... In fact, the best solution is still to use the community versions and compile them...
I am not sure if ti will work.
Maybe read the github ? https://github.com/google-coral/edgetpu
You could report your issue to the project as it is not linked to Proxmox.
No, it seems Google has ended support for this platform. Updating or even installing Coral TPU drivers is no longer possible via official channels.
There will probably be unofficial mirror repositories to install Coral TPU drivers, but active...