How to Root any Xiaomi Device without PC Easily | XDA Forums
How to Root Oneplus Nord complete guide Unlock Bootloader & Rooting
How to Mirror OnePlus 6T to PC
How to Unlock Bootloader and Root OnePlus 6T [Full Guide]
Well apparently you can debug your own phone without pc, just make sure you connect to a wifi. You can done it by installing android-tools and then pair it using wireless debugging
How to Root OnePlus 6T McLaren Without PC & Via Magisk