Taking a look at the flip-side of the logic board, we find:

Samsung K9PHGY8S7E-1CK0 flash storage (two more 64 GB chips for 128 GB on this side and 256 GB total)

Texas Instruments CD3215C00 USB type-C power delivery controller

Winbond SpiFlash W25Q64FVIQ 64 Mb serial flash memory

Texas Instruments TPS51980A synchronous buck controller

Renesas (formerly Intersil) ISL95828HRTZ CPU PWM controller

Intersil ISL6277 AMD CPU PWM controller

Apple APL1023 343S00137 (the same chip appeared in our teardown of the MBP 13" Touch Bar, and is very likely the T1 controller that runs the Touch Bar)