The OnePlus Nord 2T 5G will become official on May 19 at 4 PM CEST (that's 2 PM GMT, 3 PM UK time). This information comes straight from OnePlus itself, which has been sending emails about the event today. There's also a landing page up, where you can see the lower part of the phone's back from a few angles. If you're interested in learning more about it, however, you don't have to wait until next week - earlier this month we've seen a retailer listing basically outing everything you'd want to know about the device, and then we also got a pre-launch unboxing of it for good...
Source: https://www.gsmarena.com/its_official_oneplus_nord_2t_5g_will_be_unveiled_on_may_19-news-54293.php