Copy the resulting magisk_patched.img back to your computer.
Put your phone into (usually by holding Power + Volume Down). Download android90 root
To give you the exact steps for your device, please tell me: Copy the resulting magisk_patched
Connect to your PC and run: fastboot flash boot magisk_patched.img . Reboot your device using fastboot reboot . ⚠️ Critical Safety Warnings Download android90 root