With the exception of Google Play, you can delete all of them without issue. If you don't use them, then delete them.
> At least with Apple, you have the flexibility to do whatever you want with it and not have to worry about feeding the Google Advertising machine.
No, you're feeding the Apple advertising machine instead. It's not a coincidence that Apple's share of certain advertisements has tripled since they announced app tracking transparency [0]. I'm certain it's only a matter of time before they make themselves the only company that can advertise to iOS users. Apple collects the exact same data about you that Google does only they're less transparent about it.
[0] https://9to5mac.com/2021/10/18/apples-ad-business-windfall/