According to study more developers earning first million dollars in revenue on App Store

According to Sensor Tower almost a thousand developers earned $1M for the first time in 2021. Of those 581 are on App Store and 325 on Google Play.

Slightly more than 900 publishers worldwide are projected to surpass $1 million in 2021 on the App Store and Google Play.
Sensor Tower

Report also contains more information on app category distribution.

Sensor Tower: Nearly 1,000 App Publishers Earned $1 Million for the First Time in 2021

Reference: New data shows how many App Store devs earned $1M for the first time in 2021