The point is the income isn't showing up in the P&L.
I understand the difference between cash and accrual, but I don't know how you see that noted on a transaction.
Welcome back to the Community, @Jon Hunt,
Allow me to step in an add a few more information to help you with the missing transaction on your Profit and Loss report.
You can check the item on your sales receipt or invoices to verify whether the correct income account is selected. Here's how:
- Go to Lists.
- Select Items.
- Double-click the item name.
- Verify if the Income Account is correct.

That should allow the transaction to reflect on your report. If this doesn't rectify the issue, adding some screenshots on this thread is helpful for us to narrow things down.
Please let me know how this goes. I want to ensure everything gets resolved on your end. Have a good day!