The limited number of tanks are not intended for eastern Ukraine. They are intended for the Polish occupying force in western Ukraine post collapse. It is why the Germans were so tough to get to agree. Polo/German relations are not so good. Polish occupation of Ukraine encroaches on German borders.
So you don’t envision these tanks rolling into the Donbas?
It is a good point.. if the Russian offensive this spring is successful, Ukraine will need to establish defenses along the Dnieper River. That river would seem to form a natural frontier like the Rhine in Western Europe.