Leo, please ask Plex to create Google Home support!
(I know Echo has Plex support, but my home is a Google Home. I know there’s an Android App that’ll stream to Google Home, but it’s not voice-enabled. I know a hobbyist has tinkered with this for years at https://github.com/d8ahazard/FlexTV/wiki but it rarely works.)
I asked them, but I think many long-suffering users of Plex and Google Home need you to weigh in with Plex please!