Russia has 7 A-50U and 2 A-100. IL-20M/ Su-34M along classified number of PAKFA. that is sufficient how Ukraine operates. Tu-214R is more in minute level.Negatives for Russia: their ISR is so bad as to render their excellent shooter platforms mediocre in end effect.
ISR is not just finding targets but also protecting troops from incoming fire. UAE made mistake in Yemen when single missile strike it lost 45 soldiers (other claims much higher). satellites cannot see missile preparation in real time that give sufficient warning and that is flat desert without trees. Russia is more mobile. it is using alot more attack and transport choppers. Air defense moves with soldiers. Most of air strikes are from low g platforms like Su-25 at closer range that is taking human toll but also sustainable in sortie rate over prolong period. Russia has the capability to push every Ukrainian outside Ukraine but that is not in its interest nor outside players that it cares about at this point. so infrastructure is not targeted unless its necessary for tactical reason. wars are about larger interests that some time cannot be spelled out in public. just need to observe.
A general from Dagestan is made commander Far East. They know what they are doing.