OnePlus 7 and OnePlus 7 Pro has already received the OxygenOS 10 based on the Android 10 OS update over a month ago.
According to a OnePlus Community Manager, the company is planning to release the stable OxygenOS 10 based on Android 10 for the OnePlus 7 Pro 5G EE in Q1 2020.
Official Statement:
“Hi all, we plan to release the Android 10 update for the OnePlus 7 Pro 5G EE in Q1, 2020.”