NO - Safari does not block Google Analytics.

[Laurent]

Fake news is everywhere it seems
Full article on how the new Safari / ITP works available here.

In short:

When Safari says it blocks or prevents a tracker, what it means is that the ITP algorithm has flagged some domain as having cross-site tracking capabilities, and Safari has, among other things, stripped it of its capabilities to carry cookies in cross-site requests, also known as third-party cookies.