I just spent like 2 hours trying to virtualize aarch64 using #qemu without any success I even tried to compile my custom kernel using this tutorial: https://www.youtube.com/watch?v=LyWlpuntdU4. The only thing that I can think of to make it work is to compile everything on my rpi3 (qemu doesn't support rpi4/5) and let it run over night and see what happens.