Comment by zamadatix

It has been already pursued and is being addressed. There's just a lot less divisiveness/attention in such cases:

https://www.justice.gov/opa/pr/justice-department-sues-googl...

https://apnews.com/article/google-android-play-store-apps-an...

https://www.reuters.com/legal/us-wraps-up-antitrust-case-aga...

Note in some of these were chased even though Google has been less restrictive than Apple (e.g. on the Play Store payment case Google has always allowed 3rd party app stores on Android).