i use social media and have never gotten a shadowban. to the contrary grapheneos actually is very effective against apps like reddit shadowbanning you - if you get banned outright on reddit, for example, you can create a new profile in private space and reddit will not be able to detect that you're ban evading.
if you get banned from the profile u use in the app in private space, again, if you just delete private space and recreate it, download the reddit app again, it will be unable to detect that you're evading the ban. i previously tried doing this on other os's and reddit detected the ban evasion.
don't ask me how i know.
(just correcting this misinfo)
you're correcting nothing, my business revolves around evading these kind of checks especially on mobile apps. TikTok, for example, it is very aggressive. If you have something different than stock ROM, your reach will be greatly diminished.
Try a social media that is not antisocial. HN, Mastodon, Tildes, various forums... lots of communities and tech content are available in browsers or via open source apps
I'm not aware of any that bans you when not using an allowlisted OS, so maybe it was something else that caused this shadowban, or (more likely) that's just my bubble
the OS is great, but too risky in certain situations.