The Radeon RX 6600 has appeared online again, over a month after the RX 6600 XT arrived. The leaked marketing assets confirm not only 8 GB of GDDR6 VRAM for the Navi 23 XL card, but also its PCB size relative to the RX 6600 XT.
https://www.notebookcheck.net/AMD-Radeon-RX-6600-marketing-assets-leak-ahead-of-the-card-s-expected-announcement-this-month.558363.0.html