If the contractor has chosen Stripe Connect as their pay out method (how they want to receive payment for their invoice), it's currently not possible for customers to make payment for such contractors' invoices via Bank Transfer.
If you try to make payment this way, the
Continue button will be greyed out. Instead, you need to pay via cards (you will incur a 3% processing fee) or ACH direct debit.
Alternatively, the contractor can resubmit the invoice and use their bank account or Wise as the withdrawal method. This will allow you to pay in via Bank Transfer.