To adjust a profile's content ratings, access your profile and select Edit Profiles.  Select the profile you'd like to edit; under Parental Controls,  select Content Rating.  After entering your password, you can then select the highest level of content rating for that profile from among nine options (TV-Y; TV-Y7; ...
Disney+ just got a little more adult. The streaming service added its first R-rated films in the US on Friday with Deadpool,  Deadpool 2  and Logan.  The movies star Marvel superheroes, but as their ratings suggest, they're decidedly not kid-friendly.