Fortnite 4: 3 setting does not work for me?

I would like to take over the 4: 3 shot in fortnite and watched videos how it works, but it all looked different to me. That comes with me if I continue to open Game see picture and nowhere I find something to usersetting

You have to binaries, Win64, Config and then there should be

When I open Win64, it's just about Battleeye and easyanticheat

Then you're in the wrong place xD watch the "stretched resolution video from kCin"

I have it now so far business that I could change the resolution in Gamerusersettings but in the game nothing has changed: /