Not exactly and my network doesn’t support it so I’ve not successfully tested either. I know, and some have called me a “network engineer”. I’m working on it though.
First you’ll need a client on an IPv6 network. This should be any modern phone on a modern cellular network.
Then, you’ll need to make sure your home network doesn’t block incoming IPv6. There is no concept of “NAT” in IPv6. That is, everything is routable. This means the client should be able to directly connect to your Core without any forwarding rules. But, of course, that means your Core can obtain a globally unique unicast address and your router / service provider is allowing inbound connections to that unicast address.
If your Core is running on Windows or something else with a GUI you can open a web browser and go to one of the IPv6 testing sites (like test-ipv6.com) and it will tell you if your Core has a globally routable IPv6 address configured.
Please accept my apologies for the long delay in responding here. According to other Virgin Media users, you can simply request a backend change for your Virgin Hub to prioritize IPv4. This may be available in your case - in the case of the user here, it was a simple phone call and a free account setting change. Here’s the referenced thread: Virgin Media HUB 2.0 [notes for Ireland users]
Note that the team is actively researching easier workarounds for IPv6 support, so that Roon will auto-configure with IPv6 networks and certain common configurations of IPv4 tunneling with dual-stack lite. We don’t have a timeline or any details on this effort for now, but it’s a high priority to open up access to mobile playback via ARC to all our users, regardless of their internet service provider.