Those typically aren’t what they seem. They are dumb socket wiring adapters and the peripheral itself needs to support both usb and ps2 for it work. Those peripherals are really rare now (they were around for the usb changeover).

Man to go off topic I remember the days when USB was new and all those USB keyboards never seemed to work right “at boot”. Sure they worked okay once you got into windows but the BIOS didn’t seem to accept them.

For a few years the most reliable way to use a USB keyboard was through a PS/2 adapter that plugged into the motherboard. I remember there was quite some time where USB keyboards came with PS/2 adapters and sometimes even a pigtail to go to whatever that bigger round jack was called (a DIN connector?)