Did i make a mistake doing the roblox «face scan»

I got a notification from my cousin at Roblox and had to check it but Roblox had to “scan” take pictures of my face to estimate my age i did it without thinking much about it i dont even play Roblox so i kinda did it for no reason I’m just wondering what do they do with these pictures and am i now in some kind of system i wouldn’t like that.