Glad to have you here in the Community, @chris-veteransfa.
Allow me to share some information about paying vendor bills directly from within QuickBooks Online (QBO).
QBO allows you to pay vendor transactions online. However, all payments that are processed through (ACH) bank transfer will be charged a fee for each transaction. You can consider paying your vendor via cash or check for the transaction. This way, you'll avoid transaction fees.
Just in case you want to know more about Online Bill Payment, feel free to read this article for detailed information: What is Online Bill Pay?
Please know you can continue to reach me here with any additional questions. Thanks for coming to the Community, wishing you continued success.