MSI has removed support for Bristol Ridge CPUs in the BIOS latest update to select A320 motherboards. Many other OEMs are expected to cut down legacy socket AM4 CPU support on low-end motherboards as they find it increasingly difficult to accommodate the ever expanding size of the microcode for backward compatibility as newer generations of processors are released.
https://www.notebookcheck.net/MSI-s-latest-BIOS-update-cuts-support-for-Bristol-Ridge-APUs-in-some-AM4-A320-motherboards.421581.0.html
This is also the case for some b350/x370 motherboards as they do not have enough space on rom.