There are at least a couple of feature suggestions which cover implementing (more complete) IPv6 support:
Though, the second is more-or-less a duplicate of the first.
I say “more complete” above because Plex does support IPv6 in a couple of ways:
- Plex servers do publish their IPv6 addresses if configured to support IPv6 (network settings on the server).
- Certain client/apps do in fact support IPv6 connections. Specifically, what are now considered to be the “legacy” iOS/iPadOS apps will happily discover, and connect to, Plex media servers over IPv6. Unfortunately that is no longer the case with the “new experience” apps; it needs to be added to those.
If you’re curious as to exactly what connection information your server is publishing to Plex, you can access the ‘resources’ endpoint:
https://plex.tv/api/resources?includeIPv6=1&includeHttps=1&X-Plex-Token=your_token_here
You can find your token a couple of different ways. This article describes one:
https://support.plex.tv/articles/204059436-finding-an-authentication-token-x-plex-token/
