Death to NATO

I see what you're saying but I would think the families in NATO countries would either be more vocal or be more likely to be picked up in the press. Especially when the world's eye is already on the Ukraine situation, news about direct NATO involvement proved by deaths would be much more likely to be picked up than a (formerly barely known or talked about) group operating in a place that the Western press doesn't care about or cover.

There are also people from a several (NATO included) countries who have volunteered to go to Ukraine to fight in a non-official capacity, some of whom have died, and this gets widely circulated in the press when it happens, normally with involvement from the surviving family. If these families think their child has died fighting for good, they're not going to keep their mouths shut about it. Even if they think their child wasn't fighting for good, they won't keep their mouths shut about it.