This isn't just about which store is a monopoly, but about what companies choose to do with that fact.
Google is (was) free to only ship Google Play on Pixel phones, just as Apple only ships the App Store on their iPhones. What Google wasn't allowed to do was to "bribe" and force carriers and OEMs to favor Google Play over other stores. This is what they did, and now they have to face consequences.
The business models are very different here. Apple makes their own phones with their own OS, and can do with them as they please. In Android land, however, it's other companies making the phones, using a custom fork of the open source Android operating system, and Google is engaging in anticompetitive behavior by pushing these companies into Google Play if they want to get any of the other Google services on that OS.
Google is (was) free to only ship Google Play on Pixel phones, just as Apple only ships the App Store on their iPhones. What Google wasn't allowed to do was to "bribe" and force carriers and OEMs to favor Google Play over other stores. This is what they did, and now they have to face consequences.
The business models are very different here. Apple makes their own phones with their own OS, and can do with them as they please. In Android land, however, it's other companies making the phones, using a custom fork of the open source Android operating system, and Google is engaging in anticompetitive behavior by pushing these companies into Google Play if they want to get any of the other Google services on that OS.