What can android see?

Hello, I have used IOS my whole life and I have been looking into get a Samsung tablet for school and entertainment. I have done some research into privacy on android and have learned how I can help increase privacy on my device at least a little bit. However, I am having trouble finding out what android/google/samsung can see on my stock device. For example, if I were to use mull obtained through f-droid, could the above entities …

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