This is yet another one of the many reasons Steam is amazing. Not only do they have an abstracted layer that allows devs to insert control mappings that adapt to show your controller preference… but even BETTER, they have an option for “Universal” controller button iconography where they just show the relative position of the face buttons in a diamond layout ❖ where the button indicated is a filled circle ● and the others are outlined ○ - rather than letters like ABXY.

So like this :

…instead of “× or A or B” from PlayStation, Xbox, or Nintendo (respectively).