Multiple sources have confirmed that AMD's next-generation Zen 4 processors will limit the core count to 16 on the top model (Ryzen 9 6950X), which has a maximum TDP of 170W. The remaining SKUs are said to be rated at 120W, 105W, 95W and 65W.
https://www.notebookcheck.net/AMD-s-Zen-4-based-desktop-processors-will-reportedly-ship-with-a-maximum-of-16-cores-and-up-to-170W-TDP.551047.0.html