No they didn’t exclude them, it seems the AMD path was/is non-ryzen, which makes sense as Bulldozer was around when they started on the game.So, apparently they specifically excluded AMD code paths? Check this out:
https://www.reddit.com/r/Amd/comments/kbp0np/cyberpunk_2077_seems_to_ignore_smt_and_mostly/
If you apply that change it nets considerable performance gains on Ryzen CPUs according to those that have tried so far.
Apologies if that has been posted here somewhere already, I havent seen if so.