I didn't know where else to put this, I put it on the arch wiki, under "Unofficial user repositories", but it was removed because they don't support aarch64
So, I made a unoffical repo with packages including all branches of the raspberry pi linux kernel (4.19.y, 5.4.y, 5.5.y, 5.6.y) that auto builds with a new commit. It also includes other misc packages that I use, or are usefull.
Here's the repo: (Runs on my Raspberry Pi 4!)
[raspi_aarch64]
SigLevel = Optional TrustAll
Server = http://www.gardling.com/my_repo/aarch64