I understand the need to access the split transaction without narrowing the list, @Susanna239. Let's run another report to help this transaction appear on the reports page.

There isn't a report that shows all of your transactions for a given period, including the splits. Use of the Transaction Journal is always an option. Nevertheless, it would only display a single split transaction.

Here's how:

1. On the left pane, go to the Reports tab.
2. Next, Type the Journal.
3. Change the Report period.
4. Customize the reports, then, 
5. Press the Run Report tab.

Moreover, if you need to customize the file to add more details, this article can help you with the steps: Customize reports in QuickBooks Online. 

Please let me know if you need to manage additional transactions in your account. I'll be here to assist.