It looks like the MIG deal is off the table for sure.
The History of the deal is that Poland initially offered the MIGs without working things out with everyone else.
Poland suggested the USA would "Back-Fill" with USA aircraft.
However, it became of Hot Potato on who would risk actually delivering the MIGs with Poland tossing the Hot Potato to Germany. Germany tossing Potato to USA.
Germany said NO! The USA took longer but gave a reasoned evaluation that more MIGs at this time was less a benefit than more Anti-Aircraft misses and such.
So if the USA is to be believed the risk of triggering Russia buy providing MIGs is the real hang up.
As to the No Fly Zone. It's too late. If they had done so before Russia set up anti-aircraft batteries inside Ukraine they could have but no one believed Russia would actually invade.
To establish a NFZ now NATO would have to take out those installations. That would be an overt act on Russia and possibly WWIII
In other news Putin sent a Children's hospital an exciting gift. He Bombed them leaving children under rubble.