The automated script has been updated to support the Nano Pi M6 (Noble mainline kernel IOT/minimal image and Noble Gnome desktop vendor kernel image both tested). Use the -m option to include all loaded modules in the initrd. The boot partition size has also been increased to 400MB, which should fix out-of-space errors when upgrading via apt. The tutorial has been updated accordingly.

I rebuild with above corrections and also changed the bluetooth GPIO pins to be same as transpeed. Now I can see bluetooth before it was missing

Found the issue and submitted a PR to the repository. It will take some time to get merged and then the new kernel built and put into the apt repository.

I'm running Proxmox VE on small x86-64 hardware with multiple nics and then various LXC containers / VMs. One for OpenWRT, Unifi, Adguard Home, NextCloud, HomeAssistant, Freifunk-Offloader, ...

Exactly. Kernel support for this board might not be good enough (yet) or even might work just fine but if the hw doesn't cut it, it might be just a big waste of time.