Plex has started rolling out their new client which initially launched on mobile ios and android. Anyhow, the client itself is not being received well by it's community and one of the items I provided feedback on was that tmdb ratings are missing.

Based on the response from one of the plex developers (linked below in the third section) and subsequent responses it appears this is intentional.

Does tmdb team have the ability to reach out and attempt to influence plex to keep tmdb ratings as part of their clients going forward ? Probably not but wanted to ask.

https://forums.plex.tv/t/new-experience-public-release-feedback/910904/282