Klarna Payments missing on “Pay for Order” Page

Hello!

Klarna Payments works really well on the checkout page, where the customer is entering his details and selects the payment method.
However, I discovered, that on the “pay for order” page the Klarna Payments are not available. The theme I am using doesn’t override any functions, i already checked the code.
Do I have to select any option? What is the problem?
You can view an example of the page here https://ibb.co/VTST64Z
The example URL of the page is: https://xxxx.at/kasse/order-pay/308835/?pay_for_order=true&key=wc_order_2qNJlKZBPZGqS

I have Klarna Payments, Paypal and “Vorauskasse” as payments. But Klarna Payments is missing here…

Would be happy if you could help, thanks!