I take it you’re referring to this support article?
https://support.plex.tv/articles/200931138-troubleshooting-remote-access/
Plex optimistically assumes that remote access is available while it’s still checkingif that’s the case. This check usually takes a few seconds — in exceptions it can take up to a few minutes. This means it’s very likely your remote access setup isn’t currently working at all.
The port forwarding looks good (although there’s no need to include UDP… Plex only needs it for TCP). You could test it using a different public/external port (and configure the remote access settings inside Plex accordingly) — this way you can check if that particular port might be blocked by your ISP.
It might also be useful to check your Windows machine’s network mode (setting it to private).
There’s also a guide with some more checks you could do to pin down what’s causing this issue for you. The individual outcome of these checks will be helpful to further troubleshoot the issues.
