Hello @scharff,
Thanks for reaching out! At this time we do not have an integration that supports Mollie Payments. If you want to look into adding an integration for it to Paid Memberships Pro, you could:
1) Use this documentation to get started on setting this up yourself. Keep in mind that this is not for the “faint of heart” and does require in-depth coding knowledge and experience: https://www.paidmembershipspro.com/gateway/adding-a-new-gateway/
2) Get in touch with one of our developer partners to give you an costing estimate to integrate this for you. You can do this, by filling out a developer request here: https://www.paidmembershipspro.com/developers/
Hope this helps!