https://www.techradar.com/news/oneplus-3-and-3t-will-skip-andorid-81-and-get-the-android-p-update-instead

There's good news for owners of the aging OnePlus 3 and OnePlus 3T - both phones will be getting the Android P update.

In an announcement the company said: "After internal discussions and evaluation, we have decided to focus our development resources on the Android P project, instead of upgrading the OnePlus 3 and 3T device to Android 8.1."