In the movie "Moscow doesn't believe in tears https://en.m.wikipedia.org/wiki/Moscow_Does_Not_Believe_in_Tears
they have a dating system setup with a kindly lady send a filing cabinet for people who have no time because they are working too much... so yeah computerised dating services would exist
Do they have online dating in actually existing socialist countries? If yes, then the answer is probably yes.
In the movie "Moscow doesn't believe in tears https://en.m.wikipedia.org/wiki/Moscow_Does_Not_Believe_in_Tears they have a dating system setup with a kindly lady send a filing cabinet for people who have no time because they are working too much... so yeah computerised dating services would exist