username1234 Is it possible to setup iPhone without apple id and off loading apps without Apple’s App Store? If so, which Store/method is recommended?
Not really until they add support for sideloading.
username1234 And after that if I use privacy friendly apps, then what are the cons of using that iPhone instead of GrapheneOS? (Considering privacy/tracking etc,)
It doesn't matter how strong of a mansion you build (your privacy-friendly apps, etc.) if your foundations are crap (iOS).
username1234 Any app recommendations to block Apple trackings?
You can't block Apple from tracking you, but you could use DNS filtering to try and block some of it, I guess.