I think Google has 90%+ market share in all of those, at least in Europe.
That's kind of a weird statement, of course they are dominant / monopolistic on Android, just like Apple has a monopoly on iOS.
As for the latter being a thing but Apple not getting into trouble for their iOS App Store monopoly, I guess that is because Apple isn't using that "dominant position" to prop up a dominant position in another market (like Google is propping up their dominance in search engines).
Or maybe the overall consumer harm is considered to be much smaller, considering that Android has 80% smart mobile device market share in Europe (according to the EC press release), and iOS has a much smaller share.
I'm not sure if this is an outcome I want.
The intent is different too.
The EU is looking to protect a healthy level of competition in the marketplace, while we in the US have moved the goalposts to "can you prove this particular monopoly is doing consumers harm"?
America's "hands off" approach to regulation has allowed the country to produce companies that much of the world envies.
That is not what is illegal.
However, once you hit a certain market share (40% in the EU) you may no longer use that market share as a weapon against competitors in other areas.