Thanks for performing the steps provided, Lauren. Let's figure out how to import your classes from Square to QuickBooks Online (QBO).
Since you've already done the step to QBO, It's important to note that the information shown in QuickBooks will based on the Square app setup. Therefore, I suggest contacting their customer support team for further assistance in checking the setup for both applications.
Here's how:
I'm including this article if you need to generate a report specific to pull-up classes: Run report by class in QuickBooks Online.
If you have any additional questions regarding imports, please feel free to ask. We would be delighted to assist you further. Have a good day.