Flashing a separate vbmeta partition with the --disable-verity flag often triggers a mandatory factory reset because the secure boot chain is altered at a hardware level. Patching the boot image can sometimes bypass this requirement on specific devices.
If you see a guide saying “patch vbmeta in boot image magisk better” — that guide is for any device with AVB 2.0 (Android 8+). The only correct path: patch vbmeta in boot image magisk better