A mysterious unpopulated footprint, can I hear "debug connector"?

ISSI IS25CQ032 32 Mbit Quad-SPI Flash

Murata Type1GC 2.4GHz & 5GHz Wi-FI Module

The module includes the Cypress BCM43907 Wireless System SoC

Broadcom BCM5241 Fast Ethernet Transceiver

Silicon Labs Mighty Gecko EFR32MG1P132GI Zigbee and Thread Multiprotocol SoC

Seems to be the same SoC as the one used in the Ikea bulbs.

934 3959 1624 - With the recent announcement that the gateway will work with Apple's HomeKit, it's possible this is the MFi chip