Show me where I can get a general-purpose computing hardware with 8GB+ of RAM that fits in my pocket and has a touchscreen.

Fairphone? https://www.fairphone.com/the-fairphone-gen-6#f_slide_1

But also, I doubt any polity would have its sovereignty undermined if their general-purpose computing hardware doesn't fit into their pockets.

My recently-purchased Google Pixel 10 Pro has an unlockable bootloader. (Although it may be locked if you buy it through a provider).

And, for a nominal one-time payment, you can register as a developer, and compile, install and run absolutely anything you want on a non-rooted Android phone with a locked bootloader (within the constraints of the security system, which is, of course, A Good Thing).

and a 5g radiotelephony MODEM.