Cookie consent decides what your report can see
Advertising cookies generally require consent in the UK and EU. Some limited statistical analytics can qualify for an exception, with conditions that differ by jurisdiction. When your analytics setup requires consent, refusals can reduce the recorded session count without reducing the delivered clicks.
In a simplified example, 1,000 clicks would produce 1,000 sessions if every visit loaded and was counted once. If 30% decline a consent-dependent analytics setup, only 700 sessions may appear. This illustrates one possible cause, not proof that consent explains an actual reporting gap.
Your report can compare clicks, sessions, consent choices and page-load checks over the same period. This works because the review separates measured differences from unexplained losses instead of assuming that every missing session has one cause.