Thanks for the tip, I was wondering about the version of the AMD kernel recently.
As far as I know, there is no optimized alternative for the AMD Zen4 architecture. Simply install a kernel of your choice, for example linux-zen (this has nothing to do with the AMD Zen architecture), a kernel optimized for performance.
It is advisable to have a second kernel as a fallback in case something goes wrong, for example linux-lts.