This is an issue I will deal with myself.

I have now configured https://onedev.polarian.dev to use dual stack IPv4 and IPv6, although most people deem it useless, it is a big attraction for some people, including me, and I feel it would be a nice thing to add to the instance information datasheet allowing instances to specify what IP protocol they support.

I will write this myself, just needed somewhere to put it to remind myself :P