For the iPhone 5s, only the logic board is iCloud locked, meaning screen, battery, charging port, cameras, and nearly everything else could be switched over and work fine. Also keep in mind that the home button is locked to the logic board and will still work, however lose touch ID, if relocated into another device.[br]
[br]
Just give it a go and see if the device turns on with the replacement parts and if it’s locked or not.