This is not the M1. You can’t configure a MacBook Pro 16 inch (stated in the tweet) with anything other than an M1 Pro / M1 Max, or M2 Pro / M2 Max on the latest models.
I knew about the 13" M2 MBP (although it seems very easy to forget somehow), but maybe due to marketing materials I encountered, I'd incorrectly thought that product line started with the M2 not the M1.