Question Does asus prime a320m-k need bios update for amd ryzen 3 2200g ?

Bios is manufacturing date dependent. If that board was manufactured after the release of the Raven Ridge APU's, it'll have the (at time) current bios. If it was manufactured prior to the release, then it will have (at the time) current bios. If it was manufactured last month, it'll have an even newer bios revision.

So it totally depends on when it was made, how long it sat on the docks, how long it sat on the shelf, all that before you looked to buy it.