The back of the motherboard is brimming with even more control hardware:

Broadcom BCM4358 5G WiFi 802.11ac client

Qualcomm PM8994 power management IC (as seen in the Nexus 5X and HTC One M9)

NXP PN548 NFC controller

Qualcomm WCD9330 audio codec

Qualcomm WTR3925 RF transceiver

RF Microdevices RF1891 antenna switch module

Skyworks SKY77814-11 power amplifier module for LTE