The roadmap leaked by a trusted source close to GamersNexus shows how AMD may skip 2021 entirely and launch the Zen 4 desktop CPUs along with the Zen 3 APUs in 2022 with support for DDR5 RAM and USB 4.0, citing the current uncertain economic climate brought upon by the global pandemic.
https://www.notebookcheck.net/Leaked-roadmap-suggests-AMD-Zen-4-desktop-CPUs-with-DDR5-support-may-only-launch-in-2022-no-relevant-AMD-CPU-launches-planned-for-2021.463331.0.html