I'm in the same situation, well, sorta but worse. I did a cutout, two colonies, from the same wall. Found the upper queen but not the lower. Combined but they balled and killed her. Now I have a capped queen cell. She should emerge in a few days as it was uncapped last week. Anyways, I see ZERO drones from my hives. I really hope there are a few around so she can mate!
There is a feral colony living in someone's house less than 1 mile away. Hopefully those colonies there have some drones that will make their way over to my yard.