... Yeah. That makes sense.
So far, my hope is that someone develops at first just a stable de-googled ROM for a Nothing CMF phone, and then that can grow into being supported by a more security focused android ROM/distro.
You sound like you know more about the technicals about this than I do... afaik there are a few actually secure either android forks or just linux distros that run on android hardware... but they basically only support stupid expensive phones.
Would really be great if a decent quality, actually affordable, reasonably secure phone existed.