Thijs Is this really about one specific app? PDS2 requires a XS2A interface (-> an interface with standardised functionality that any 3rd-party provider can use). According to Finanzguru Bunq is not fulfilling this requirement as the interface lacks functionality and/or the functionality is broken.
Besides that, the Bunq developer team hasn't released too many features since this bug was opened (namely a wheel of fortune, and a feature that forwards credit card payments to the relevant accounts).
While these features were developed, Bunq has worked very slowly on bug fixes. Since 8 months there is a bug with the Google Pay contact details that permanently disables Google Pay for people that hit a rate-limit while setting up Google Pay on a smartwatch. While I'm writing this, this website (made by the same company that built the API) is throwing an API-errors "you don't have the permission for that" every 30 seconds.
How can one come to they conclusion they even focus on anything? Even banks that have almost no online-presence managed to fix their Finanzguru bugs faster.