The F16 sadly is another promise to the Ukraine like the Leopard tanks that were supposed to punch through the Russian defense lines like a knife through butter that won't perform,this from US pilots...
Just learning to fly an F-16 is a small aspect of what it would take for a Ukrainian fighter pilot to be combat ready in the type.
www.thedrive.com
"Going into combat against a Su-35, even a Su-27 in contested airspace — now you’re talking about years of experience. You can’t do that with a brand-new guy who has seen everything once! You can have all the capabilities of the jet, but if the pilot doesn’t know how to use it correctly, then that’s useless. So for a pilot coming from a MiG-29, having to learn a brand-new PVI [pilot-vehicle interface] where everything looks different, use weapons that they’ve only ever read about, to give them three-months training then toss them into combat — that’s a tall order!"