I am aware that back a few years ago, 2018 iirc federal law was introduced which granted additional powers to law enforcement in regard to telecommunication equipment, though only skimming though the rules, but not greatly understood - I was left to assume if the device is discovered via a search, the law can view and copy data the device stores or accesses if they so desire.
I actually have an old pixel phone that given to me and has GrapheneOS ... but like the rest of my cheap phones, I only use them for phone calls, texts, photos, time piece, maybe once a year utilise GPS and a hotspot when the signal from the nearby towers are good enough to get some bandwidth. [Mobile networks as such that my usual location can be so iffy even receiving a simple sms in a timely manner can be a challenge]