I’m sorry, Gijs, but this isn’t expected to be built soon. We’re very busy working on requests all the time, and as far as we know (from the votes), this would help just one customer (you), and to compound this, it’s a large and complicated project. We’re prioritising other requests that will help lots more customers in one go; I’m sorry.
The Stripe Direct Debit feature is higher on the list and will likely be implemented before Mollie. This is because it’s a much smaller/simpler project (we can leverage a lot of the work done before for Stripe card payments), we’re already very familiar with their APIs, and it’s got far more votes.