I just installed plex on my Android decice and my PS4, because everywhere I look, folks say I can mirror my phone to my ps4, but no one seems to say how.
When I hit the cast button in Android, the only option that shows is Soros, even though both devices are on the same network.
Keep in mind this is an Android/PS feature, not specific to Plex.
Plex has it’s own casting feature where you can playback content to the Plex app on the PS4 from the Plex app on a phone. This is casting, not mirroring.