[duskwuff]

OP is being denied access to Google Pay payments processing, not to the Play Store.

[uncletammy]

I was under the impression that one of the conditions to being listed in the Play Store was that all in-app payments had to go through Google. Am I wrong about that?

[igordebatur]

This. It would be against the rules to use any other payment methods.

[donclark]

Point taken. But if he hosts it himself, could he not use whichever payment processor (except Google Play)?