First of all, massive thank you to @markdegrootnl for the initial project and to @kiwimato, @snowsnoot and @Top-Cat for their forks. 👏

I have been able to find the time to put together a working repo for the latest version of UNVR firmware, with separate automatic builds for firmware packaged unifi-protect version and latest version.
You can find my project here: https://github.com/dciancu/unifi-protect-unvr-docker-arm64

I am just leaving this here for anyone in need of a more recent version.

All the best to everyone!