In the US attending your graduation ceremony has zero bearing on whether the university recognizes if you achieved a degree or not. Is the UK or Oxford differen

In the US attending your graduation ceremony has zero bearing on whether the university recognizes if you achieved a degree or not. Is the UK or Oxford different in this regard? Who cares if someone attended a ceremony. This sounds fraudulent at first glance. People with legit credentials don't need to add technicalities to their claim.