That has been the way of how things were done in hardware from the start I'd say, just look at any moderately complex PCB - you can see each IC as a "microservice" of sorts, even analog function groups (oscillators, bandpasses, filters, ...) made out of discrete components can be considered "microservices" of sorts IMHO.

All this is is moving the definition scope of an individual "service" from the IC to the chiplet level.