[pjmlp]

Ironically iPadOS has much better offerings for on device development than any Android tablet, with exception of Samsung's Dex.

[goosedragons]

Dex is just a fancy window manager. With Termux and an Alpine or Ubuntu proot there's very little even a Kindle Fire can't do on the device. It's even possible to run X11 and a desktop environment like XFCE4.

[pjmlp]

Not on modern Android, given the lockdown on NDK APIs, while Termux folks refuse to embrace JNI instead of private Linux syscalls (as per Google's point of view).