Android 11 has arrived for the OnePlus 5 and OnePlus 5T, albeit in the form of custom ROMs. Neither device is ever likely to receive Android 11 officially, so custom ROMs will be the only way to access Android 11 from here on out.
https://www.notebookcheck.net/The-OnePlus-5-and-OnePlus-5T-can-be-upgraded-to-Android-11.494878.0.html
"The OnePlus 5 and OnePlus 5T have received better software support than most Android smartphones, "
Really?? Do you know the status of OnePlus 5T right now? Tehy provide us stable android 10 but it's full of bug, they haven't fix for four months, and our current security patch is in April 5, 2020.
Please do some research before writing an article.