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.
Rooting or jailbreaking your device won't make your smartphone not tracktable. It only open possibility to disable feature which could invade your privacy or limit what an application could do.
Even so, you can't prevent tracking from cell tower triangulation.
Someone correct me if I'm wrong, but I can't see any benefit to using both a VPN and an obfsproxy bridge simultaneously to connect to Tor, unless for some reason you wanted to hide the fact you were using Tor from your VPN provider?
Me either. Since the ISP could detect you based on known entry node IP, one could use unlisted/private Tor Bridge with pluggable transports