Chatrooms/Chat with strangers/video chat are NOT blocked from parental controls (dating)- how to block accsess?

Hi,
i would like to block all access to chat/video chat websites 

as "chat with strangers", chat Rollet ,

all "omegle" kind of stuff

but i don't see any option to block this category.

hopefully the parental control have dating site to block - but not those chat websited.

what can be done?