Hi there,
New TESTING version of iodéOS, here is iodéOS 3.0, based on Android 12 
It’s avaliable here and here are the instructions 
Neither me or iodéOS are responsible for bricked devices, only do that if you know what you’re doing
[read EDIT 3 first] Please also note that the avb keys were made for iodéOS 2.4, I don’t know for the moment if they are compatible with iodéOS 3.0. I haven’t tested it, as I keep my bootloader unlocked for now. You’ll be updated in the next future (you can also join the Matrix (#iodeOS:matrix.org) or Telegram (just search iodéOS) beta group).
EDIT : Bluetooth audio not working for the moment
EDIT 2 : Bluetooth may work with a workaround, in Developers options, enable the “Deactivate A2DP hardware offload” option. Not 100% guaranteed, worked for @anon9231953, may cause another issue with battery consumption, I’m gonna ask for more details 
EDIT 3 : avb keys seems to be usable with iodéOS 2.4 latest builds and iodéOS 3.0 too
Here are some screenshots of it :
Hope you’ll enjoy