Thats the thing. Ukraine's aircraft capabilities couldn't match Russia's and there was hamstring on bringing more f16 due to several factors. You get the clickbait such as ukraine developing their own cruise missiles (that has too many parts involved for me to believe out the gate) and such but things are looking rough. It was hamstrung to use long range missiles supplied by the US to targets inside Russia because of feara of Russian retaliation. They were in a tough position as it was but you can't even engage the enemy like that