Area51 stats shows indicators: Needs Work, Okay and Excellent based on the criteria. You can see that for any beta sites e.g. Area51 stats for Hinduism Beta but I have found that no such indicators are being displayed on recently release beta sites: Drones and Model Aircraft and Materials Modeling. Among these two, Materials Modeling in still in Private Beta and may be because of that reason indicators are not ready but following is a screenshot of Drones and Model Aircraft proposal which is in Public Beta:
But here you can no no Needs Work, Okay and Excellent indicators are being displayed. Is it a bug or criteria are under review or something else?