The reason the primary targets on day one were all airbases and air defence infrastructure was precisely to allow Russian air superiority. The idea is to either destroy the Ukrainian air force on the ground or to deny the Ukrainian pilots anywhere to land, refuel and rearm IF they made it off the ground in the first place. It's pretty standard stuff you can read in any book on modern conventional military strategy.
Russia failed to catch the Ukrainian planes on the ground, and failed to seize or destroy any substantial air bases or air defence sites. They definitely made an impact, but the Ukrainian air force is still in operation and that is part of the why the Russians are losing armour and helicopters - their air force isn't dominating the sky.
There's a decent article on this exact subject - "The mystery of the missing Russian air force" I think it's called. Will dig it out and post a link now.
Edit: link here:
On the fifth day of the Russian invasion of Ukraine, one of many unanswered questions is why Russia has launched a military campaign at huge cost with maximalist objectives, and then declined to use the vast majority of its fixed wing combat aircraft.
rusi.org