Airtel Xstream Broadband has switched to CG Nat

I am still getting a public IPv4 address. Based in Pune. I think only some locations are CG NAT or IPv6 enabled
 
Location: Chandigarh
I am getting cg-nat ip 100.x.x.x but not able to configure ipv6 on TP-Link ax10.
bridge mode is enabled and is connected to tplink router.
When i try to enable ipv6, i does not provide any ip and internet stops working.
 
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