The phone tracks things you don't even realize it's tracking. Here's an example - in China so called "payday loan" apps are very popular. These apps determine your credit worthiness by all the usual metrics - your "credit score", your employment status, and all that normal stuff we think of when we think of getting a loan. But they track other things because they are a phone app - one of which I guarantee you haven't considered is the "state of charge history" of your phone's battery. You see they have found that people who regularly charge their phone's battery at nearly the same time and location are more "credit worthy" than those that have more sporadic charging amounts, times, and locations.
You can extrapolate from this example how much information your devices track and you can see that there is NO END to the uses that your "provider" will find for said information. Imagine all the metrics they are looking at that you haven't considered or don't even realize exist?!?!
In terms of your modern connected Subaru - what do you suppose they do with your digitally enhanced, recorded and function-fit fuel level data stream? Anyone?!?
Sadly it's nigh impossible to get completely away from it. The best practice seems to be to abstain as much as possible from these "technologies". In reality they provide little in terms of actual benefit to the user other than entertainment and a good book will provide more than these devices could ever hope to offer. Reading and Doing (in that order) are two of my most important goals. I credit those two habits with virtually all of my success in business, mechanics, electronics, software development, etc, etc. Watching TikTok videos, playing with "friends" on social media, and being subjected to incessant advertising is for those that will end up giving ME their money for the privilege of having my knowledge and power fix their IOT junk and reconnect them to their drug habit or their wage slavery.
GD