Good day, @gwenni33.
The option to automatically match invoices to downloaded payments using bank rules is unavailable in QuickBooks Online (QBO).
Bank rules can automatically categorise transactions for you so they go into the right accounts. However, this won't receive payments from your sales.
For now, you have to manually look for a match when receiving invoice payments in the Banking page.
I can see how this option would be helpful for you and your business. Therefore, let me take note of this as a suggestion to improve your QuickBooks experience.
To get more details, you check out this article: How to review downloaded bank and credit card transactions and put them in the correct accounts.
Just tag my name in the comment section if you have any other concerns or questions. I'll get back to you as soon as I can. Stay safe