What about your concern for Brest, etc? There’s a reason why Russia wanted to keep the Polish territory they stole and take German territory at the same time.
Russia should return the Eastern Polish territory that they stole from Poland.
Look, the lands changed hands many times over the centuries, if you are going to keep fighting those old battles, you’ll never get anywhere.
This is one case where “ethnic cleansing” was a good thing. As harsh as it was, it kept the old conflicts from rising up again in Europe.
No Poles are interested in that, they know Lwow and Wilno will never be Polish again. They’ve moved on.