No one can use their planes and helicopters. There's a lot of drones all over the place. Ukraine and Russia are "near" peers. Sort of like what you saw in WWI where Germany was fighting France and UK on the Western Front.
In WWI, by mid 1917, the Allies managed to gain air superiority, in that their bombers and recon/spotter planes could wander at will (at the cost of significant casualties) anywhere behind the German front.
The Allies did this through numerical superiority. But of course in those days air-ground weapon systems were primitive.