This seems to follow the rumor from earlier in the year…

https://www.techpowerup.com/308065/amd-to-shift-some-of-its-4-nm-cpu-silicon-fabrication-to-samsung-from-tsmc. May 1st report date

Interesting. My speculation previously was that AMD would use Samsung to produce lower end GPUs and APUs, freeing TSMC for higher performance parts. Not sure what these reported Zen 5c parts will be.

In any case, I think it makes sense for AMD to diversify.