> This is primarily because those companies haven't updated their payments systems to be compliant.

For big companies with decades or more of legacy cruft, it's a hell of a lift to make their universe compliant. Especially if your large company tends to fall onto the "decentralized org structure" part of the spectrum where a billion teams run around doing their own thing with very little top-down oversight.

It's the same kind of story as it was for GDPR (and CCPA to some extent). Some companies can pull it off easy because their org structure is way more top down. Others that are bottoms up have a much harder time because you have to heard a million different teams towards something new that doesn't really deliver much immediate business value.

I assure you though, these companies are all no doubt hard at work making life better for their india customers... it is just a much harder lift for their organizations to handle. Which is not to say their org structure is a bad one. It just isn't optimized for top-down mandates like these.