Hadn't realised (until your comment) that Omarchy doesn't work on non-intel macs; that's a shame. https://github.com/basecamp/omarchy/blob/quattro/manual/44-m...
https://github.com/malik-na/omarchy-mac
Dual boot, it's not exactly the same as the main Omarchy, but it works fine out of the box. Software can be limited because not many packages has been compiled for ARM but we are software developers ;)