The Apple Store suggests Among Us is appropriate for kids aged nine and up, due to infrequent cartoonish violence and horror themes. However, this does not account for the fact that the game is centered on themes of deception, and that playing with strangers comes with inherent risks.
There is a profanity filter on the game as standard, but it can very easily be disabled and (like any unmoderated chat groups) children can be exposed to inappropriate, sexual or explicit language. Among Us is currently available on both PC (via the gaming service Steam) and mobile devices.