My opinion is that unless you’ve met both the boy and the girl, however briefly, you shouldn’t be the shadchan. Take it or leave it.
If you re-read the circumstances I gave you will see that I was neither offering to act as shadchan, nor redting two people because they are male and female so your disagreement is misplaced.
Hearing enough about someone to believe they MAY be shayach, and passing on the name to the parent is hardly suggesting two random humans.