I don't believe magisk is removing the forceencrypt flag in vendor, only ramdisk, removing from vendor would require a module, you also need to format data before booting and after removing the flag so it's probably not working.Thanks, so this is only small part related to kernel and also needs system partition change.
Now I get why magisk is involved, a systemless module I guess.
@Davil_79 have you checked whether magisk can do this?
The next point of concern that I haven't looked into yet is trebble, the vendor partition is separate on trebble devices so the 2nd fstab may exist in there.
I'm going to grab a U11+ RUU tomorrow and look at whipping a ROM up