The Mac made an epic comeback last year equipped with the newest M1 chips, making up with record sales for the years of getting neglected in favor of its iPhone cousin. There had been situations when developers had to give up on creating an extra Mac version of their iOS app or weren’t happy enough with the results when they did pursue the idea. The iOS development, thus, is in higher demand, it has superior tools, and is more cost-effective. There are many, many more iPhones out there, they dominate Apple’s revenues so that’s where most of their attention goes.
The macOS market share is much smaller than the iOS one. How Apple’s M1 Chips Make macOS Development Much Less Costly