OnePlus has just added some of its newer devices to the Android Enterprise Recommended (AER) program. However, this has created confusion as the OEM originally left its new webpage on the subject on "quarterly security patches" for all of the models in question. This has now been corrected, in conjunction with a statement from a company representative.

https://www.notebookcheck.net/OnePlus-reaffirms-its-commitment-to-regular-software-updates-for-its-newer-phones-following-a-fan-s-worrying-discovery.508722.0.html