Copyingy my other comment here about e/os:
e/os is the worst "private" mobile OS. It is just a LineageOS with a bunch of proprietary crap. Their STT even uses OpenAI as a provider.
Also Murena founder has made some diabolical claims about exploits about how they aren't developing their OS for "pedos":
However, we don't have a "hardened security" approach, we aren't developing a phone for pedo(censored) so they can evade justice.