GSI Treble patches. Included Phh, Andy Yan and my personal Treble works. You can using patches/solutions from here and from linked manifests (all or few my own) in none-commercial usage only and you should giving link to this repo and credits to the proper author
Can you confirm method to get root / superuser in CAOS - not Magisk.
/system/xbin/su
to/system/bin/su
Not sure what I am missing - unable to get superuser at all.