The question is whether this might be purely manufactured propaganda, or whether some in Russia, and even at upper levels have decided they better make some effort to return kids so as to be able to have some favorable propaganda. Teens are old enough to remember things and report them, and may be credible witnesses in War Crimes trials. I’m sure there are oligarchs who don’t want to be forced to limit travel because they become connected with Putin’s charges, and also some in the child care branch who are worried that they could be charged like that woman in charge of all the child removal mess.
The problem Russia has is, this is the 21st century and it cannot guarantee that the Ukrainian kids in its “care” will become enthusiastic converts to Russification and disappear permanently from the digital world. Often the “adopting” parents are middle class. Often, they’ll have access to technology. Either Russia has to actually treat these kids well and guarantee their silence that way, or treat them like cattle and hope the truth doesn’t come out.
It’s not like fifty years ago where activity in a small town or village would be invisible even to a nearby population.
All it takes is for these “adopted” kids to Keep Schtum until they have an opportunity to tell their stories.
There is no question that this is MORE uke propaganda, none. I must say though, that's an impressive nutter ping list you've got there.