Nobody panic! A lot of the coverage around the Big Sur update to Safari scared SEOs into thinking Google Analytics would be completely blocked by the browser. Yes, it’s complicated, but in reality the update isn’t that extreme. Third-party cookies and some cross-site tracking is indeed being blocked, but not GA itself.
Read the full story here: https://www.simoahava.com/analytics/no-safari-does-not-block-google-analytics/