Apple - How to switch window with swiss german keyboard?

Never mind, I just figured it out by myself:

It turns out, on swiss german keyboards, the shortcut for cycling through windows is not command + tilde but instead command + backtick. The backtick is on the same key as caret, which is the first key to the left of the backspace key. Therefore, I need to press:

command + shift + ^

And you can edit this in your general settings > keyboard > shortcut to suit your needs.