Hey there, @jimrandall.
Thanks for reaching out to the Community for support.
In QuickBooks Desktop, when you export reports to excel, you'll want to ensure you have all collapsible rows open before exporting. The data displayed on the screen is the only information that will export.
That said, let's try opening all the rows, then exporting to Excel.
Please let me know if you continue to have issues exporting the data. I'm always around to lend a hand. Take care!