Check the full list of compatible CPUs for your Mobo CPU.
The B550M-A mobo supports CPUs from earlier generations. The site claims broader compatibility than the original listings.
After BIOS updates, more CPUs received support.
The majority of B550 boards are compatible with the newest Zen 3 processors.
Additionally, numerous B450 boards accommodate the latest Ryzen processors from the fifth generation.
Refer to the B450M-A compatibility checklist.