But when we talk about our privacy in general its already stolen by android and IOS devices
For most users, yes, but you can quite happily root a smartphone and install an open source OS on it such as GrapheneOS or Ubuntu Touch, along with a non-google app store such as F-Droid. It's perfectly possible to de-google all your devices (and for free), you just need to have the motivation to do so.
Rooting or jailbreaking can make our smartphone non trackable but it leads our device is easily hackable so its only for the pro users not for the normal users.