I would really like to have this feature as well!

Why: I currently use MoneyBird for my bookkeeping. Now I have to manually login to the bunq app, locate the invoice, download the invoice and send it to my mail. From there I import it into MoneyBird. If the invoice would be send to my mail I could setup a forwarding rule to send it to moneybird. This way the invoice could be automatically imported into my bookkeeping. And I can just focus on my sleep... eemh work. :D