Apple APL1W86 / 339S01037 S7 64-bit dual-core applications processor layered under a SK hynix H9HA28A12MNLTR-4KJ likely 1.5 GB LPDDR4 SDRAM & 32 GB NAND Flash Memory

Apple 338S00325 power management

Probably STMicroelectronics serial EEPROM memory

Texas Instruments TPS62821 1 A synchronous step-down DC-DC converter

Texas Instruments TPS56637 6 A synchronous buck converter

onsemi NCP160AMX330TBG 250 mA / 3.3 V LDO regulator

Nexperia 74AVC1T45 voltage level translator/transceiver