You need to look at using the dateTk and timeTk to join the Date and Time dimensions
dwh_performance.date_dimension dd ON
intvolfact.dateTk = dd.tk
That should show you the unique fullDate values for which you have internal volume daily performance facts.
Edit: cleanup to make SQL legible. This example is SQL based because I thought that was the approach being taken. You should be able to do something similar in the OCI DWH drag and drop reporting tools - I don't have the object names memorized as I only dabble in reporting