This is very good but not war-changing. Ukraine was seriously low on combat jets full stop. F-16 can pretty much do the same job as the Migs and SUs.
As far as dog fighting flankers, without AWACS and fuel tanker support, the capabilities of the F-16 are severely diminished. She’s got a small radar, and short range. And NATO isn’t going to let the Ukrainians have access to the top shelf armaments bc they don’t want Russia, Iran, and China reverse engineering battle captured tech.