Is no surprise at all.
Ukraine will need Western combat aircraft to resecure its skies against Russia, an examination of the air war over Ukraine concludes.
aviationweek.com
“Failure in the air domain has prevented [Russian forces from] securing necessary superiority, let alone supremacy, and thus they cannot provide the required support to their land forces,” Royal Air Force Air Marshal Johnny Stringer, deputy commander of NATO’s Allied Air Command, told RUSI on Nov. 3. This failure, he added, means Russian ground forces “do not have the necessary freedom of maneuver, let alone air-delivered support to prosecute the ground fight from [as] close to deep as they would wish.”
Air defense and airpower are not the same thing, even though both are in the same milieu. Air defense is always reactive while airpower is supposed to be proactive. The keyword here is 'supposed'. It means that the wielder of airpower
SHOULD be prescient enough to recognize the potential of airpower to strike anywhere and know the likelihood of certain consequences. A bridge or a road are not combatants, but each is a conduit for combatants. So if a bridge is damaged/destroyed, enemy logistics would be negatively affected. The typical 'if P then Q' reasoning. The Russian failure in the air domain meant someone in the Russian military leadership is not wise enough to understand the total capability of airpower. Ukrainian ground forces are essentially not restricted in their movements by Russian airpower, so the inevitability is that the Ukrainians are able to restrict Russian ground forces.