You won’t have any of the electrical or software info for any of the components unless you’re a manufacturer and most parts aren’t really salvageable separately but are essentially one big glob on the board. Even with the skills, you’d need to reverse engineer some of the most complex and hard to use components ever manufactured for consumer use and somehow fit them in places they were never meant to fit.

And yes, software. The board support for the SOC, mostly. Maybe starting off with a pinephone or something might help, but I doubt even that is open and usable enough.