Despite the fact that all five generations of AMD Ryzen processors are designed for a single AM4 socket, there is no full compatibility with chipsets of all series and generations. This is due to the internal structure and architecture of the processors and the functionality supported by the chipsets.
yes* — to support this series of processors, you need to update the BIOS.
yes** — To support this series of processors, you need to update the BIOS. In agreement with AMD, BIOS updates with support for Ryzen5000 processors for the B450 and X470 chipsets will be released no earlier than the beginning of 2021.