AMD may have just launched another RDNA 2-based graphics card, but it has already confirmed that it is working on next-generation models. The Navi 3X series is not due until deep into 2022, mind you.
https://www.notebookcheck.net/AMD-confirms-Navi-31-and-Navi-33-development-of-next-generation-graphics-cards.555475.0.html