Hi kimbo-howe,
QuickBooks Online (QBO) allows integration with a number of third-party apps.
As per checking Procore app is not yet a supported application that can sync to QuickBooks Online. You can go to the Apps tab or go to Intuit App center and search for the app name.
If you have further questions about Procore app and how to integrate them to QuickBooks Online, I recommend contacting their customer service team.
Please know that you can always get back to us if you have any questions about QBO.