They would certainly try but it's not part of their standard training. The reason is simply that events where both (or even more pilots depending on the aircraf

They would certainly try but it's not part of their standard training. The reason is simply that events where both (or even more pilots depending on the aircraft model) are incapacitated are extremely rare. In addition, air traffic control is not responsible for flying the aircraft, that remains the pilots' task for the time being.