Reliance Jio deployed cheap native v6 and tool massive market share. They single-handedly moved the market.

It's been discussed on the apnic blog and at meetings heaps

Adding on. Jio was a late entrant, so they could not get significant ipv4 address space without great expense. They deployed as mostly v6 with a tiny CGNAT. They also had an extensive 'pre-release' offering at zero cost to subscribers which got them a huge number of subscribers and clout to encourage internet services to offer ipv6.