Thermal pads and cameras aside, let's get to those chips! On the front side of these motherboards (top: S10e, bottom: S10), we spot:

S10e: THGAF8T0T43BAIR 128 GB Toshiba UFS NAND flash storage

S10: KLUFG8R1EM-B0C1 512 GB Samsung eUFS NAND flash storage

Samsung K3UH7H70AM-AGCL LPDDR4X layered over Qualcomm Snapdragon 855 SoC

Qualcomm WCD9341 audio codec

Qorvo QM78062, likely a RF Fusion front-end module

Maxim MAX77705C PMIC

Skyworks SKY78160-51 Low Noise Amplifier