Welcome aboard, Jeremy C.
I'm here to share some information about integrating a third party app in QuickBooks Online.
The data imported to QuickBooks Online depends on the information shared by the PayPal app. Since you're unable to sync your transactions coming from PayPal, I encourage you to give them a call.
Their Customer Support Team will be able to check your account and the settings of the app to help with the import.
If you have additional questions related to your QuickBooks product, please don't hesitate to reach out. Wishing you all the best.