iOS > Settings > Privacy > Analytics
Not sure, but https://exodus-privacy.eu.org/en/ lets you check any app for the presence of trackers. Is that relevant?
Its more for being able to learn from how they implement the various Kits and technologies to do similar things
not sure what section you mean, but check out jadx: https://github.com/skylot/jadx
Experience in java is recommended.
If anyone else was going to suggest decompiling, ^this is a decompiler.
You can look at some of the documentation to see how at least some of it works.
https://developers.google.com/google-ads/api/docs/start
And here’s Matomos analytics
https://matomo.org/guide/apis/
Is that what you’re looking for?
Generally speaking it’s not possible to strictly deduce code from its output.
But you can establish a pretty good guess by converting log messages into regexes then using those regexes in github code search.