How to set up IPv6 routes in Windows with 6to4 Bridge configured in the router?

Question

Windows

I'm trying to set up work with IPv6 in Windows 7. The provider is not friendly with ipv6, ipv4 comes from it via DHCP. Router TP-Link Acher c6 V2, set up a 6to4 bridge in it. Windows itself shows both ipv6 and local ipv6, but at the same time a real connection with the Internet via ipv6 - tests do not pass, pings do not beat. What needs to be done and how in this situation, so that everything works as it should?

PS: not an admin himself, but you need to configure it to check local scripts via curl in ipv6 networks