Hello sarah-peet-mercu, thank you for bringing this to our attention.
The batch action option to “get paid via Direct Debit” on the Sales > Invoices page has been submitted to our team as a product enhancement request.
Though we do not have a time frame available for enhancement projects, please rest assured that this will be prioritised against ongoing work.
In the meantime, you can continue to get paid by direct debit by selecting “Get paid by GoCardless Direct debit” per each individual invoice.