Having seen this kind of logic board once already, we've gotten pretty good at pulling this PCB sandwich apart. Let's see what's on top of the top layer (XS on left, XS Max on right):

Toshiba TSB3243VB5275 64 GB NAND flash storage

Apple/Cirrus Logic 338S00248 audio codec

Cypress CPD2104 USB-C port controller

NXP Semiconductor CBTL1612 display port multiplexer

Texas Instruments SN61280E battery boost converter

Bosch Sensortec accelerometer/gyroscope