I think the biggest thing lacking in this kind of hardware is displays. Where can you find a phone-sized 1080p display that doesn’t require signing some NDA or reverse engineering the specs? OLED would be even better for battery life.
I don’t see that probably 360p black-or-white e-ink display is going to be a good experience unless you’re comparing it to a flip phone.
On linux it’s just called running an executable
Edit: As a less snarky answer, you can run Android apps natively on linux by installing Android OS in a container using something like
AnboxWaydroid.