Alpha 1 of our 21.10 raspberry Pi version of Ubuntu Budgie is now available for testing.
https://sourceforge.net/projects/budgie-remix/files/budgie-raspi-21.10/
So this has the very latest budgie arm tweak tool as described in the first post.
It has the very latest budgie desktop v10.5.3, the very latest GNOME 40 stack, latest Pocillo & Qogir Gtk theme.
Currently snaps such as budgie-welcome do not work.
Do give this image a try - early testing allows us to resolves things before the final release.