IPv6 Enabled But Doesn't Work?

Update for the IPv6 issue
Now I’m getting a IPv6 address only but it’s working fine but there is no IPv4 address 🥲.

Then I called the LCO he told me he configured in the OLT IPv4 to IPv6 then I asked him to change to IPv4/v6. He said he will do it tomorrow
 
@!!..PD..!! I’m in a smile in pain situation 🥲.
You’re absolutely right 💯. I’m facing some issues while connecting to my access point(ax10) because of the IPv6 only connection 🥲😭
 
Update 2 for the IPv6 issue
At last my LCO updated the configuration IPv6 to IPv4/IPv6.🥹

When the connection was in the IPv6 only mode I was able to get a IPv4 address when the IPv6 Is assigned ( I changed in the ont settings Ipv6 to IPv4/v6 yesterday and it worked)

so I tried the pppoe-wan obtain IPv6 manual and DHCP v6 client and attached the pppoe-wan in it’s device in the openwrt and got the IPv6 address assigned.

Currently when I try to disable the IPv6. It won’t work. So I find a solution I disabled the lan IPv6 option so device won’t get an IPv6 address

BTW I used the IPv6 and it’s completely broken and has unstable latency problem and I also faced YouTube buffering when I set the video quality to 4K.
 
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Does anybody know the BSNL’s IPv6 prefix length ?
In openwrt IPv6 prefix is set to 64 as default
 
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I am getting 10/10 IPv6 score only on the testing server hosted in India.

My mobile devices prefer IPv6 over IPv4 so it really becomes a bottleneck sometimes. What could be causing this?
 
Tough to guess. Could be a configuration or hardware issue. I would suggest to get a separate router and configure PPPoE to test.
 
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