Our google ad has its reporting on a hubspot dashboard with hubspots data. whilst they have been slightly different in weeks as expected last week there was a large difference between the two with hubspot picking up next to no views compared to GA4.
I've added the tracking codes directly into the individual pages since as GA4 had a banner last week saying it had been updated and thought possibly this could be connected?
To troubleshoot this, the best option would be to look into details in your account. Therefore, I would recommend connecting with HubSpot Technical Support, as Support is included in your subscription and they will be able to provide real-time assistance for this matter, including hopping on a screenshare if necessary.