USA and allied forces never was good treat the POWs well. They usualy ended up ay KIA, because the white flag menas "shoot here ".Now it is important to treat the Russian prisoners of war well. It's difficult after 6 months of war because a lot of hatred has built up on2 both sides.
Problem is, if there will be any bigger POW captured by the USA controlled units then there will be a rage from Russia, and possibly Putin won't be able to keep everyone calm.
It could spell serious consequences for Ukraine, and for the EU .