Oxygen OS 10.0.1 is a simple HotFix update for the original Oxygen OS 10 but quite important. So if your phone is running the previous Oxygen OS 10 then download the Oxygen OS 10.0.1 HotFix right now. It comes in a small package of 113 MB in size over the previous one. So you can capture the OTA update by simply going to settings > about phone > system update > check for OTA updates.
As the update is fresh out of the oven, the full stock firmware downloads for Oxygen OS 10.0.1 are not yet available. The OTA updates and full stock firmware (ROM) zip will be available for download for OnePlus 7 and 7 Pro on both Global and EU stable variants here.
Oxygen OS 10.0.1 fixes all the bugs from OOS 10 and includes all the features from it. The OTA is now rolling out for OnePlus 7 Pro in a phased manner across the globe for the Global, US, and EU variants.
Downloads for OnePlus 7 Pro:
Download Global: Oxygen OS 10.0.1 Android 10 for OnePlus 7 Pro (direct link) | AFH mirror
Download EU: Oxygen OS 10.0.1 for OnePlus 7 Pro (AFH link)
All Android 10 builds including rollback package
To retain root, do not reboot when you've finished the local update method but instead hit home and open magisk app. Tap Install, Install, install after OTA to inactive slot. Then reboot. If you want to then install TWRP , open magisk then click modules and the plus sign then pick TWRP .70 zip (download the 70 version from that thread) and then go back and do it again for magisk 20 (again download it from magisk forum or within the app). Then reboot. You should be good now with rooted 10.0.1 and TWRP.