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.
As long as you don’t use some shady, unofficial ROM on a phone, most phones are actually vastly more secure than your typical Linux/Windows OS.
How long is your passphrase on your phone compared to your Linux/windows OS?
A phone is designed for quick usability, which is the enemy of security.
Sure, if you have a 20 char password on your phone and never install any sketchy apps, then it might be ok. But the whole phone ecosystem is just less secure because its designed for convince, not security.