It would be fantastic to automatically generate invoices in HubSpot whether it be via API or in the workflow.
It would help take out the manual work from having to do this one at a time for companies that generate dozens of invoices at a time. We can already do it with quotes.
there is an update in hubspot updates page, look for "Invoices API", you will need request the beta. I am creating invoices via API since December 2024.