1. "far larger" refers to Android market share in US, not Android versus iOS.
2. The article, and the comment, is about Apple pulling iMessage and FaceTime. Not about the merits of the law. WA has not threatened to pull.
Smartphone market share June 2023
US:
iOS - 57%
Android - 42%
UK:
iOS - 51%
Android - 49%
So no, not “far larger” at all.

Mobile Operating System Market Share United States Of America | Statcounter Global Stats
This graph shows the market share of mobile operating systems in United States Of America based on over 5 billion monthly page views.


Mobile Operating System Market Share United Kingdom | Statcounter Global Stats
This graph shows the market share of mobile operating systems in United Kingdom based on over 5 billion monthly page views.

And yes the article and discussion absolutely are about the merits of the law.
Two strikes for you, one more and your out.