I did say "almost". But as you mention there aren't many alternative. It would be a better world if there were several options besides just Graphene that prioritize security.

In reality you have iPhones (in lockdown mode meaning you mist throw some of the usability away) or GrapheneOS if you prefer android.

No other hardware and software solutions come close. Cellebrite matrix shows it pretty well (and from late 2024 cellebrite cannot even extract entire phone form the unlocked GOS.

What they are doing is difficult and expensive.

The talent pool that is willing to work in a nonprofit is not likely large.