What type of pedals are these? My brother bought a second hand bike. He’s now looking to buy shoes. But we are uncertain what type of cleats he needs.
Is there some sort of guide on how to identify the pedals?
They are road pedals made by XLC parts.
https://www.xlc-parts.com/en/road/bike-parts/pedals/

At XLC you can choose between clip-in pedals based on the SPS or Look system.

You should be able work out which system that pedal is using from the part number and get the appropriate set of cleats.
Probably either Look Delta or Look Keo.