As a Revolout and Monese user you can login into PayPal directly. This way you don't have to enter your IBAN and/or Card Number and the account is automatically validated and verified. Also bunq seems to be blacklisted by PayPal. Probably because bunq gives you so many IBANs. Also Monese shows all your PayPal activity in a diffrent tab inside the monese app. It would be a great way to keep up and organize your finances all inside bunq.