With all those things crammed into the phone, the motherboard is shaped to fill the remaining space. Let's see what goodies we can find on this chocolate silicon bar:

HiSilicon Hi6421 power management IC

HiSilicon Hi6422 power management IC

STMicroelectronics BWL68 wireless charging receiver IC

Halo Micro HL1506F1 battery management IC

Dot projector

Microphone

Beneath the motherboard, we spot a copper plate running down the left of the frame. This is similar to the Mate 20 X 5G's liquid cooling system.