Lingerie-Marijke-Green-Lion Sander I think this is reported as a single batch in 'traditional' banks in the transaction overview. Since your accounting package already knows what the underlying payments are, the payment can also be matched via the batch, instead of having to cancel all individual transactions again.
Same as for example collection batches. You create this yourself with the underlying payments, but you get it on your bank statement as one additional payment, regardless of whether there are 1 or thousands of underlying transactions behind it.
Possibly that bunq can build this in as an option for these customers?