Hello there, CVD.

Thank you for sharing your thoughts in the QuickBooks Community about printing bill payment stub in QuickBooks Online. 

Currently, the bill payment stub can only show up to 13 bills and line 14 summarizes the rest. Only the vendor's name, check amount, and the check date will show up when you print the stub.

As a workaround, you can run the Transaction List by Vendor report that shows all items on a Bill Payment Stub. 

Here's how:

1. On the left pane, select Reports. 
2. Search and select the Transaction list by Vendor report.
3. On the upper right corner, click Customize.
4. From the General section, change the report period to All Dates.
5. From the Filter section, change the Last Modified Date to the date the check was entered in QuickBooks Online.
6. From the Transaction Type section, select Bill.
7. From the Vendor section, select the vendor from the drop-down menu.
8. Choose Run Report.

For additional information on this, I recommend the following article: Print more than 14 lines in the voucher section of my check?

We take our customer ideas into consideration when looking for product improvements. I’ll be sure to share your thoughts with our engineers to see if this feature will be available on the next updates.

Also, as what @Rasa-LilaM mentioned, you can send your suggestions straight to our Product Developers through QuickBooks or go to the QuickBooks Online Feature Requests site. 

Please know that I'm only a post away if you need additional assistance about printing bill payment stub in QuickBooks Online. I'll be happy to help you out.