Looks like the info isn’t present consistently on a number of components that I use so I had not really noticed it.
For example of the nest components only the nest Weather Sensor has that mark. While I know ALL of the nest components are cloud based.
I also didn’t see anything on the newly announced Arlo component so I guess it isn’t a strong standard / requirement yet.
It would be VERY handy for this indicator to appear on the Components Search screen under the logo etc. It might also help with figuring out which components don’t have the IoT class info at all.