Android 13 is not a thing yet. Since it doesn’t exist, and deppends exclusive on Google, there is imposible to know what will happen. OnePlus support their devices for two years, with an extra year of security updates.

Will OnePlus 7T get Android 13?

It’s possible that it will also receive an update to Android 13 in 2023, as the OnePlus 3T received four flavors of Android during its update lifespan (Marshmallow, Nougat, Oreo, and Pie). OnePlus rolled out Oxygen OS 10.0. 5 for the OnePlus 7T on November 7, 2019. … OnePlus announced the Oxygen OS 10.0.

How long will OnePlus 7T Pro be supported?

well oneplus promises two years of software updates and then one year of security updates for all its phones. SO, considering that 7T was launched in 2019 so Oneplus are going to support you until 2021 with an aditional year of security updates.