Frankly I do not know.
So update from Mel Gibosn :
You know...I KNOW for a fact that Russia is involved in trafficking children. More than one person I've met has told me their story...whether kid sold b/c it settled a debt or kidnapped. I have personal experience with some of these people.
It would not surprise me at all if almost every one of the Ukrainian children that were taken are being sold on the black market to fund Russia's war or pad the coffers of Russian oligarchs.