Here's a close up of that T1, er, TI chip?

Texas Instruments CD3215C00

We can't ID this guy, but it's in the same spot that Apple claim their T1 chip that powers the Touch Bar is.

That's kind of a surprise, considering there's three similar ICs peppered over the rest of this logic board, and a pair of them in the Function Keys model.

This could be a USB type-C power delivery controller with the T1 chip below it (APL1023/343S00135)