According to reports, AMD plans to launch at least one Radeon RX 6600 series card in three weeks. Rumour has it that the company will unveil two cards, both based on its new Navi 23 GPU. The Radeon RX 6600 may arrive a few months later than the RX 6600 XT, though.
https://www.notebookcheck.net/The-AMD-Radeon-RX-6600-and-Radeon-RX-6600-XT-may-launch-in-different-months-first-Navi-23-card-due-on-August-11.551851.0.html