For now, you can connect to these email providers with IMAP using app passwords. But oauth connection is a planned feature because Outlook seems to have disabled password connection for IMAP.
I’m building an accounting automation tool that captures and extracts information received from your billing inboxes and send them to your accounting system. I had this idea after freelancing and running a small software business in Estonia for 4 years. Let me know if you want to become an early adopter!