This is entirely speculation on your part.

Google has been more transparent that it happens. Apple is definitely collecting information on everything you do on their devices as well. It may be just as much info.

With their new pay later feature, you know they are at least collecting enough info to make financial decisions based on your profile.

They also collect health data using the watch.

They collect more than that in order to better understand how to keep people in their ecosystem. I’d wager the latter will about cover what OP was surprised by Google capturing.

Microsoft is another story. They are the most valuable tech company in the world right now due to AI. Which indicates that they are training some powerful AI on data that has been gathered in a number of places.

Unless your government id has a PO box on it you’re likely not going to get the results you’re looking for. As somebody else mentioned, that info is public record.

They are absolutely mining data.

I will say that Apple is 100 percent collecting your data. Health, financial, biometric, anything you put in an Apple Device is subject. Like most large companies, the are probably also purchasing profile data from Acxiom and Experian.

I don’t know if they are doing it with this service but Apple is definitely not respecting your privacy. If you are concerned about privacy, you’re better off trying to use more specialized tools for a job than any singular ecosystem. Apple wants everybody to be in their single ecosystem to better build profiles in their systems.