The only time I'd recommend updating BIOS is either to update for hardware compatibility and you're confident it's BIOS, to improve security, there's a documented feature that you will use, or the manufacturer strongly recommends it for some reason. Otherwise I don't see a point. I also hate that release notes of most BIOS updates are super vague.
Also in my experience (and this is just my experience, so take it how you will), BIOS updates may cause issues. I recall an old P65 board I had that I updated to absolute latest, but it refused to take a video card until I rolled it back to the last version. My last system, a B450 board from MSI, had issues going to one update and I couldn't roll back because you can't roll back versions if the BIOS update contains an AGESA update.
There's also the fun bit that most AMD 300/400 chipsets on AM4 have a BIOS size limit of 32MB, and a lot of BIOS updates that brought compatibility to Zen 2 processors dropped support for some processors (mostly Athlons) and simplified the BIOS interface.
If you're thinking about updating BIOS "just because", hold off and do some research to see if you can figure out if the BIOS update is really beneficial or not.