I feel like i might of made a huge mistake. I’ve deployed a game onto the app store - but ad’s was still set to test mode. Is there anyway to change this without having to redeploy it? - It’d take a few weeks for apple to update i think… 
Having same issue. With Unity latest website updates, is this option still available? It seems like they have removed this checkbox at all. And I do remember that previously it was there.
I forgot to uncheck the “Ad Test Mode”. I’ve deployed a game onto the google play store and then I’ve unchecked the check box of “Ad Test Mode”. My unity developer said this check box connected to their server so don’t worry ad will start working after 1 or 2 days. its 2nd day ad’s still set to test mode. Is there anyway to change this without having to redeploy it?
This can be fixed without pushing a new update for the game. See @umarswls answer to find the right place to do it.