Its rear-glass unit includes the flash and wireless charging coil; battery, screen and glass each have separate guides.
What to check before buying
Rear glass
The back-glass guide describes the combined flash and wireless-charging unit. Replacement also requires adhesive, and Apple Repair Assistant can pair a new genuine rear-glass part on supported iOS versions.
Battery and screen
Battery work and screen work use different procedures. The screen guide notes that the battery cannot be disconnected before initial display removal.