Thanks for the quick response. I mean what's the procedure of moving to your latest build from completely stock oxygen os.
Oh, I think it should be something like this:
1. Make sure you are on OOS 9.0.2 or above (9.0.5 recommended)
2. Boot into fastboot
3. Flash latest TWRP and boot into it
4. Wipe dalvik, cache, data & system
5. Flash the unofficial PixelExperience 10 build
6. Optional: Flash Magisk v20.1