Are there ISPs in India who provide proper IPv6 connectivity?

[vignesh_venkatesan]

Sure, check out this post by @varkey Using VPN or Cloud VM to bypass CGNAT. | Internet (General Discussions)
Basically instead of using the interface with public ipv4 use the interface which has a public ipv6 address to connect to zero-tier and change settings in all clients to use the DigitalOcean droplet as a gateway.

I have a doubt..Can I tunnel my entire traffic (Both ipv4 and ipv6) through this method ?

 

[a.c]

Pretty sure you can, though you will have to tinker around with iptables a bit but it's definitely possible.