It definitely helps--the vast majority of snooping comes from Google Play Services, so options like GrapheneOS + microG or CalyxOS resolve that issue quite nicely. They also have app-specific firewall abilities, so you can disable background or foreground network connectivity on any app you're suspicious of.
Thanks! I'm still using an old iPhone SE (2016) as my daily driver, but sooner or later iOS support is going to drop and I'll have to find a decent upgrade path. Considering my size, headphone jack, and fingerprint reader preferences, I think the Pixel 4a is the only device that seems viable to me on the market today... hopefully I'll still be able to pick one up in a year or two and slap GrapheneOS on it.
