Good day, peter-henderson.
The option to match multiple payments to a single expense on the Banking page is currently unavailable. Let me provide a few details.
You can only match a single payment to multiple recorded expenses in QuickBooks Online (QBO). On the other hand, adding a tip should be recorded differently.
The following article will provide more information: Share tips with your team.
Let me know how it turns out. I'm always around to help.