I cant join medal hub on rblx i dont even have the option to ask to play

https://preview.redd.it/53c94uivlebh1.png?width=1188&format=png&auto=webp&s=29738c5fe82efa2e4a4e6cfc09202b5cf21c0267

can somebody please explain this to me for other game 16+ it says ask you parents but not on this