Has anyone managed to root the latest firmware 10.012.HD01AA for OP7T Pro using this guide? It doesn't work for me, and latest magisk doesn't offer options for Prserve AVB 2.0/dm-verity & Preserve force encryption. With the exception of Prserve AVB 2.0/dm-verity & Preserve force encryption that isn't possible in my magisk version (the latest), i follow all others steps and I can't get WIFI functionality back, while also the phone crashes after a while and restarts.
I had to do a clean install on 10.0.12 HD01AA and Magisk/root works fine (using v21.1; I use TWRP and adb pull the boot.img instead of what is listed in the OP of this guide). The Advanced Settings will only show up "legacy devices" now with Magisk Manager v8.x.x (you don't need to worry about the dm-verity and force encryption anymore on the 7T Pro with latest Magisk Manager).