Over the past few years, the highest grossing games are freemium pay to win games, like Star Trek Fleet Comman. While they're available on both android and iOS, the fact that iOS users tend to me more affluent means that the revenue tends to come from in-app purchases on iOS more than android.

This was shared on HN a couple months back, I found some nice games there: https://nobsgames.stavros.io/

This was my experience doing consulting/contracting for most of the 2010s. Clients would want both iOS and Android, and we’d release with full feature parity. In every instance the iOS apps brought in 2x-5x the revenue, even when our Android apps had more active users.