You probably bought a server motherboard, so the ports are there for old KVM-type devices. Good luck buying a consumer motherboard with VGA and PS/2 ports.
Here you go. It's a little older, but AM4 is still competitive, especially if you're using video from the CPU. In which case, the lack of a 500 series chipset isn't a big limitation.
Depending on the rules there's also the https://www.asus.com/motherboards-components/motherboards/pr... with ps/2 and while there is no physical VGA you can passive adapter one out of the DisplayPort connector.
If it were passive, I'd say it counts (maybe some board connected vga to the dvi-a pins?), but I not the OP.