AGESA 1.1.9.0 / 1.2.0.0 Firmware BIOS
We have confirmed from internal sources that AGESA 1.1.9.0 is under development but our sources suggest that the version will be known as 1.2.0.0 once it's available to the public.
Once again, the BIOS based on AGESA 1.1.0.0 and 1.1.8.0 firmware is BETA and an unofficial variant whereas the proper BIOS will launch in January 2021 by all board makers including MSI, Gigabyte, ASRock, and ASUS. To sum it all up as far as AMD Ryzen 5000 CPU compatibility is concerned:
ASRock - Unofficial BIOS based on AGESA 1.1.0.0 Firmware (B450 Only)
Gigabyte - Unofficial BIOS based on AGESA 1.1.0.0 Firmware (X470 & B450)
ASUS - Unofficial BIOS based on AGESA 1.1.8.0 Firmware (X470 & B450)
MSI - Official BIOS based on Future AGESA Firmware (Coming January 2021)
On the other hand, there are multiple board vendors who are planning unofficial BIOS support for 300-series motherboards including X370 and A320 series