Good day, usersam-rogers.
When you run the Project Profitability report, you can see the transactions under a specific project, and that can include journal entries.
Here's how:
- Go to the Projects tab.
- Locate and click on the project.

3. Pick the Project Reports portion.

4. Click View on the Project profitability section.

5. Click a specific amount from the report.
6. From the Profit and Loss Detail report, you can see the Journal Entry.

Additionally, I'd be happy to share the following guides to become more familiar with managing projects in QuickBooks Online (QBO):
If you meant something else, please let me know. Any additional information would be a great help.
Feel free to go back to this thread if you need anything else while working with projects. Have a good one.