neoen
GrapheneOS treats cellular, Bluetooth, NFC, wifi as potentially hostile at any moment. Mint and Reynolds aren't allowed into your phone.
Best you can do is avoid social media and use end to end encrypted messaging like rcs, signal, threema.
Avoid email and services from big tech Giants
If you must use social media, don't stop your scrolling to watch cool car videos or similar.
Then you're set :) that'll be almost all of data collecting gone.
Well, except for ring cameras, flock cameras, any other cameras that governments have installed that are managed by a private company and they are allowed to have the data...