Hello @ottoschoitzfound,
You can use the online bill payment to transfer your vendor payments in QuickBooks Online. Please be informed that even if you do not have a monthly subscription to use this feature, you'll be charged a fee for payments you made online.
That being said, here's an article you can read to learn more about processing vendor payments online and the nature of utilizing it: Find answers to frequently asked questions about Online Bill Pay.
On top of that, I've also included this reference helpful with the resources needed while with your expenses and vendors: Enter expenses, pay bills, write checks, and manage suppliers in QuickBooks Online.
Don't hesitate to post again here if you have other questions or concerns with QuickBooks tasks and navigations. I'm always around happy to help. Take care and stay safe!