Actually, my 7pro is already unlocked with TWRP 3.7 + Magisk.On my forum I recommend this method:
- Unlock the bootloader on OOS 11 (if your need)
- Disable all Magisk modules before updating
- Update locally (from settings) via zip
- Not reboot after updating the firmware, install Magisk in both slots (active and inactive)
Try this metod, if magisk was not previously installed and the system is clean, you can skip the magisk item, as far as I understand
Okay, I'll do it and will let know you.
Maybe today or in a few days (need time).