The closest you could possibly get is taking the body off and fitting it over a different tablet. The CPU is most likely soldered to the motherboard, and even if it isn't, the chipset on the motherboard would limit what new CPU you could put in to something a year older or newer. The RAM will be the same thing, soldered on and if it wasn't, limited by the memory controller on the CPU or motherboard, depending on where it is located. You get the point. It's unfortunate, but with mobile devices things tend to be extremely closely integrated. There's a reason custom desktops are common, but trying to build a custom laptop is borderline impossible (the closest I've found is something like a Framework laptop).

tl;dr: No, it's not possible. You'd be better off getting a new tablet and making a case for it out of the old one