How do I make the input configuration appear on the OBS game screen at the end of the run?

The sources "Game capture" and "Window capture" does not work for me

You can add a second window capture to get the input display by window title or capture the entire screen which is easier. Then you just drag it into view.

It worked, thank you

the input rules for valid races are confusing for me as i understand little english.

here my input config, is it valid?

Yes those would be considered valid bindings, as far as I can tell.

so it is also valid to have "Up Left" on the A-button for example? doesnt that conflict with the one-to-one mapping rule? or am i fine as long as there is nothing blue marked in my configuration?