Tipster @KOMACHI_ENSAKA recently claimed to have spotted product listings for the AMD Radeon RX 6500 XT and RX 6400. The cards are reportedly built on the Navi 24 GPU, with 4GB of GDDR6 across a 65-bit memory bus.
https://www.notebookcheck.net/AMD-may-be-working-on-the-entry-level-Radeon-RX-6500-XT-and-RX-6400-with-the-Navi-24-budget-cards-reportedly-featuring-4GB-of-GDDR6-memory.580417.0.html