Google Analytics is being blocked by an increasing number of web users. It's blocked by those who use open source browsers such as Firefox and Brave. It's also blocked by those who use open source browser add-ons such as the uBlock Origin. It's not uncommon to see 40% or more of the audience on a tech site blocking Google Analytics.
See Transparent, open source alternative to Google Analytics
Google Analytics is the most popular website analytics tool. Millions of developers and creators turn to it to collect and analyze their website statistics. More than 53% of all sites on the web track their visitors using Google Analytics. 84% of sites that do use a known analytics script use Google Analytics.