Why not run Android directly, such as using Graphene OS. It's decades ahead in both OS architecture, developer tools, and developers compared to non Android based Linux operating systems.
Graphene OS exists because Google lets it. You can't rely on competitors that can only exist in this manner
Graphene uses the Google codebase, so Google is choosing its long-term development strategy and standards it will support. It's like choosing Chromium to escape Chrome.