GA4 EXPERT NEEDED TO SOLVE ATTRIBUTION ISSUE

IMPORTANT: Do not apply if you do not know the following:

Acuity Scheduler. GA4, GTM, unassigned traffic

I have server side tracking with stape, and all the UTM's set up correctly but for some reason there is some traffic showing as "UNASSIGNED" in addition to this the google ads revenue is no longer matching any where close to GA4. It was working before server side so something gone wrong, perhaps a simple fix? hopefully less than one hour