Not all of them will fly at the same time.
Some will be unavailable for various repairs, some will be too far from the interception target to get in time, some will inevitably destroyed from time to time. 200 isn't that far fetched.
If they've already had their most advanced pieces of hardware pulled out, its doubtful. Nevermind finding someone to actually pilot the damned things.
What Ukraine needs more than anything right now is more young professionals capable of operating the hardware of war. What they're getting is a military garage sale.