https://stevecheney.com/why-android-first-is-a-myth/
A good summary of why startups continue to launch iOS-first and not Android. It's quite focused on VC-backed companies, but the following quote sums it up for almost any kind of app-based business:
Building and releasing on Android costs 2-3x more than iOS. This isdue to a multitude of reasons: less sophisticated tools, generallymore cumbersome APIs, fewer exposed advanced features, enormous QAissues brought on by fragmentation, etc. The rough rule of thumb isfor every iOS engineer you actually need two Android engineers—ortwice the development time.