Except, they're not. And by the way, they are two completely different conflicts.
With Ukraine, if Russia had been able to establish total air dominance early on, they wouldn't have been stopped in their tracks the way they were. The fact that they weren't able to do that has nothing to do with cheap drones, which became a decisive factor only much later.
In Iran, US and Israel were able to establish total air dominance, but they didn't have any plan to follow on with boots on the ground, which is still necessary to actually defeat an enemy. And most successful hits so far were achieved through ballistic missiles, not cheap drones.
With Ukraine, if Russia had been able to establish total air dominance early on, they wouldn't have been stopped in their tracks the way they were. The fact that they weren't able to do that has nothing to do with cheap drones, which became a decisive factor only much later.
In Iran, US and Israel were able to establish total air dominance, but they didn't have any plan to follow on with boots on the ground, which is still necessary to actually defeat an enemy. And most successful hits so far were achieved through ballistic missiles, not cheap drones.