ok, If i select passthrough in ipv6 then connected device not work with ipv6 can't ping to ipv6. if reboot router 5 times then only few time some device can ping to ipv6 some cant ping.. means not working well..
when show ipv6 on whatismyipaddress.com then ipv6 not detected. But if i show network adapter properties on windows then show public ipv6. However not connect to ipv6 only site. like.. https://k6usy.net/