Let me correct myself, the anti-Ukrainian Polish battalions were set up by the SS-und-Polizei through the general Polnische Polizei as the Orpo units. (From https://superhistoria.pl/druga-wojna-swiatowa/66953/historia-batalionu-202.html in Polish about the Battalion 202.) Some others such worked for the Sipo (I completely forgot to mention the Sipo, the security police).

My distant relative from the German side (and from Germany) served in the SD and was killed by the partisans in Croatia. I know the SD had for example a Russian police "assault brigade" that after killing lots of Belarusians defected to the Soviet partisans and was then hunted down to last man by the Germans, among other eastern collab units.

So anyway (I've read a much more detailed article about then once), these Polish Orpo

policemen often participated in the pacification of Ukrainian villages, often committing crimes against the Ukrainian civilian population. On the other hand, Polish policemen convoyed and evacuated the Polish population threatened with extermination by the UPA. In total, approx. 2 thousand Poles served in the ranks of the Schuma [battalions] in Volhynia. The administration of the Polish [underground] government in these areas, however, strongly opposed joining these battalions, threatening to "be removed from the ranks of the Polish nation" for murdering Ukrainian women and children.