Názor k článku AMD odhalilo technologii 3D čipletů: Procesory s 64MB 3D V-Cache osazenou nad jádra Zen 3 (update) od del42sa - This technology will be productized with 7nm Zen...

This technology will be productized with 7nm Zen 3-based Ryzen processors. Nothing was said about EPYC.
Those processors will start production at the end of the year. No comment on availability, although Q1 2022 would fit into AMD's regular cadence.

https://www.anandtech.com/show/16725/amd-demonstrates-stacked-vcache-technology-2-tbsec-for-15-gaming