Zen 4 is rumored to launch in late 2022, so later this year and in early 2022 we will be getting only refreshed Zen 3+ models. According to a new leak, the first products to integrate the 6 nm Zen 3+ tech will not be the desktop models with V-Cache or the Rembrandt chips for laptops, but the Ryzen embedded V3000 launching in late 2021. These processors will feature support for USB4, DDR5-4800 RAM, and will have a maximum 35-54 W TDP with integrated RDNA2 iGPU.
https://www.notebookcheck.net/AMD-rumored-to-launch-Ryzen-embedded-V3000-processors-with-6-nm-Zen-3-cores-and-RDNA2-iGPUs-supporting-DDR5-4800-RAM-and-2x-USB4-connectors-in-late-2021.546945.0.html