https://wccftech.com/amd-might-be-considering-ryzen-zen-4-desktop-cpus-with-ddr4-compatibility-for-existing-am4-motherboards/

At Computex 2022, AMD reaffirmed that its AM4 motherboard platform wasn't going anywhere and will continue to serve the PC gaming segment for the foreseeable future and it looks like the company might be considering launching a variation of Zen 4 for it.

The rumor comes from Greymon55 who has stated that according to an AMD CPU reseller, the red team might be planning to bring Ryzen CPUs based on the Zen 4 core architecture on the AM4 chip platform. The leaker isn't sure if these plans would bear fruit but it would be an interesting decision nonetheless.