My Rule of thumb on BIOS updates is that you should ONLY flash an updated BIOS if it has improvements/features that your current BIOS doesn't have that will benefit your setup.
In other words if your PC runs well with the current BIOS you don't need to update the BIOS.
In my current case I am running a BIOS version that is 4 versions old because the newer versions don't add anything that will improve my current setup.
The newer version for my MB are all for compatibility with the new AMD Ryzen 3000 Series CPUs and I have a Ryzen 2000 series CPU.
So until I upgrade my CPU updating the BIOS would actually make my PC run worse than it does now.