Thank you for your inquiry.
You can find our documentation for Shopify here: https://app-wallee.com/en-gb/doc/shopify
I am under the impression that most of this has already been done by yourself.
What is the issue? I suspect that you have to add the payment methods.
You can do this in your shopify integration in wallee, by clicking here:
You can also do this directly in the documentation by clicking on the individual payment method links in chapter 4 here: https://app-wallee.com/en-gb/doc/shopify#_adding_the_payment_gateway
You will then be asked if you want to add the method to Shopify - directly in your shop.
I hope this helps. If you need further information, it is best to contact us directly here: firstname.lastname@example.org - This way we can check your specific inquiry in more detail.
I hope this helps!
Let me know in case you have any follow-up questions on this.