The Russian airforce has a huge numerical advantage over the Ukrainians, however they have yet to establish air superiority over Ukraine and their airforce is notably under utilised in the conflict so far. A few reasons are discussed 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
Other people have also mentioned their lack of spare parts.
Do you think this will be taken into account by PAF wrt it's views on the capability of IAF?
The Russian Federation has already established Air Superiority over the entire Ukrainian territory. The Russian Aerospace Forces have destroyed nearly all Ukrainian air defense systems. Evidence to this effect is E.U making an announcement to send military aid to Ukraine, which includes air defense systems.
The objectives set out by the Russian Federation is to neutralize the military capacity of Ukriane and it's associated infrastructure, including air force and air defense, which could aid NATO in the event Ukraine is contrived into their member's club. The other objective is to denazify Ukraine of the neo-nazi groups which are embedded in the Ukrainian military or attached to it.
If Ukraine continues on the path of joining NATO, an organization responsible for the destruction of Libya, Syria, Afghanistan, Iraq and Yugoslavia. The alliance is a direct and deadliest threat to the sovereignty of the Russian Federation. So if Ukraine continues down this path, the elitist ruling class of Ukraine and it's Nazi Battalions will find themselves eliminated by the Russian Federation. No ifs, no buts, as when a state actively pursues to join a military alliance who poses a direct threat to Russia, there is no question, such a state will be checked and neutralized forthwith.
The E.U can wail all it wants about Ukraine, the reality is that E.U, U.S & U.K all are equal criminals in their wars to destroy Iraq, Afghanistan, Syria, Yugoslavia, Libya and Yemen.
Those who live in Glass Fortresses, dare not throw stones at others, else they will be shattered to an oblivion, in their hypocrisy, duplicity, death and destruction of countless innocent people of weak nations.
As for E.U, U.S, U.K sanctions on the Russian Federation is concerned .... they may have started this encirclement, sanctions and wardrums against Russia, but they have no chance of ever winning against Russia.