there are a lot of CPUs that fit the AM4 socket, but this mother board based on a 450 series does not support the Ryzen 3000series or up. I think due to bios limitations from Lenovo.
Now here things get vague: In one way Lenovo sez the M725s’s are not upgradable to run win 11. Other hand Win 11 supports the AMD 2600 and the 2700.

Anyone got an M725s with a Ryzen 2600...