I've tried for 2 days straight to pay my Belarussian supplier via Bunq/TransferWise and I'm giving up. The documentation is extremely lacking, the Bunq app gives cryptic, non-translated error codes. TransferWise Support makes conflicting statements on the possibility of making these payments at all. Bunq Support channels have been friendly but not very knowledgeable.
I seriously regret opening a Bunq account for my business. The app is very shiny, but only if you do the most basic payment stuff. I would NOT recommend it for anything business related.