The OnePlus 6T is on a short list of upcoming smartphones mentioned in the ARCore 1.5 APK. This app supports up-to-date Google-provisioned features such as Lens. This feature is also to be included in the Nokia 9, as well as two as-yet unnamed Huawei phones.
https://www.notebookcheck.net/OnePlus-6T-may-be-approved-for-latest-version-of-ARCore-already.335592.0.html