In fairness, plenty of actors are taking steps in doing x, aka, mobile Linux operating systems. It's difficult as fuck, even for those with lots of experience, in ways that primarily boil down to the proprietary nature of smartphone communications infrastructure because of companies that have taken actions similar to Google, and then were supported by overreaching legislation. (From what I understand)
This shit runs so deep and has been running for so long, but we've only recently started hearing more about ongoing projects because of the flagrant privacy violations surrounding us. Just because so many of us only recently started paying attention, myself included, doesn't mean that these solutions are new.