I've worked on 'IoT' but only in the sense that IoT things are assumed to be small and low power, so small, low power designs are needed.
However making something small and low power is also a means of making is embeddable in other ways, such as in many places across a huge chip. The technical problem is the same. The need for small and low power is not IoT. However it is the justification to PHBs for doing what you do even if your primary application is something other than IoT.
In the mega corp I work for, I've been handed two recognition awards (plaque and cash) for meeting IoT challenges (I.E. making a design of mine 20X smaller) when it's primarily so I can put it the middle of other circuits at the point of use rather than bussing data across the chip. This yields many engineering benefits.
But IoT is the thing, so you sell it as an IoT solution and management pays attention.