I think poland could enforce defensive stands in its borders and shoot anything that comes close to its borders with ukraine's permission. Even a no fly buffer zone. Would be only fair to protect their population
When Russia struck the barracks early on near Lviv and the Polish border, I argued the same thing based on the premise that a Russian missile would inevitably cross the border with strikes so close to Poland. Setting up an air defense shield for the NATO borders could also cover a sizable distance into Ukraine to prevent incoming missiles from striking again. It will also give the Poles and others practical experience using Patriot and other air defense systems.