India has a following issue with Android ecosystem, almost everything not owned by Google, is owned by some Chinese co.

GetJar - sold to Chinese

PayTM - Chinese shareholder

Flipcart - Chinese shareholder

Zomato, swiggy, + 10+ others online delivery/logistics apps. Some used to be reskins of Chinese apps. Some only have Indian C-levels.

20 something messengers - all except FB, and Twiter are Chinese

...

I believe they quickly realised that to ban Chinese apps, they have to ban a lion share of apps in daily use, and here this app store comes.

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P.S. As I understand, a huge amount of Android phones in the third world doesn't have Google App store pre-installed, as manufacturers don't bother to go through arduous Google certification for low end phones, or provide OTA updates. This is why things like GetJar are still a thing there.