What did Apple take away here? The app icon? Android support has been gone since 2020 and most (all?) of the features of Dark Sky are integrated (and enhanced apparently) into iOS 16. So you have a situation where all the people that "had a good thing" now have it by default without an extra app they have to click on and now more people will have that good thing by default for free. If anything, this is anti-anti-competitive behavior because it's PRO-consumer. Apple is literally giving away a $4 app that was previously available ONLY to iOS users to all iOS 16 users.
If this is anti-consumer in your mind I would really like to hear what acquisition is not an antitrust problem from your perspective.