OK, this is genius marketing by Matomo, and absurdly accurate.

https://www.linkedin.com/posts/matomo_googleheimer-googleanalytics-uasunset-activity-7079338312888451072-rmTR/

But it's time for another PSA:

If you rely on GA or GA4 (or "most" other analytics packages) to track # of visitors are on your site, what pages they're visiting, etc. you're likely getting numbers that do not reflect reality. Most people/browsers block all of the well-known analytics packages.

Plus, you're feeding the Google for free.

Just say no.

Use your server logs. It's the only way to be sure.