I created a google takeout and in that zip file I found some files containing a ton of data about me. It has logged every single page I visited while using the google search engine and chrome browser. It even logged every single time I opened an app on my old android phone. It even has VOICE RECORDINGS of me and a log of every time I used google assistant. This is just some of the data and I’m very sure there is even more data they have.
Its not everything. Thats hyperbolic. Metadata is usually more profitable then the data itself.
Not literally everything. But if you’re sending unencrypted data via internet, even data you may not be aware of. It’s likely being stored by some company.