Poland is not supplying any pilots. That being said, I wonder if Ukraine has enough pilots, airfields and infrastructure to keep those planes flying regular sorties.
I watched as a kid the resupplying of North Vietnam by USSR and China and I never heard Walter Cronkite once assert that this effort to reprovision the North Vietnam with weapon etc. could start WWIII.
No AWACS, and Russian S-400’s smoke them day 1.