Tipster @Execufix spotted a reference to AMD's upcoming EPYC Milan server lineup. An unspecified EPYC Milan server chip was found to operate with a base frequency of 1.5 GHz and a boost clock of 2.2 GHz, in line with ES clocks for EPYC Rome parts. If EPYC Milan hits these clocks in its final avatar, it should provide a noticeable performance boost versus EPYC Rome parts.
https://www.notebookcheck.net/AMD-EPYC-Milan-engineering-sample-spotted-in-the-wild-7nm-Zen-3-ES-runs-at-up-to-2-2-GHz-matching-EPYC-Rome-ES-speeds.480294.0.html