This is just asking why acquisitions happen. There are plenty of reasons, and they typically don't demonstrate monopolistic behavior, certainly not in any legal sense.
[1] E.g.: https://www.theverge.com/2022/9/8/23343336/apple-tim-cook-im...
If this is anti-consumer in your mind I would really like to hear what acquisition is not an antitrust problem from your perspective.
In a related vein, it's exciting that Apple is investing in Apple Maps as a competitor to Google Maps, especially since Google bought out Waze a few years ago.
https://www.androidpolice.com/dark-sky-api-android-weatherki...
Would I be better off dependent on Google? A company that has the attention span of a crack addle flea?
Would I be better off depending on a small private company?