I read your answer and checked different ways of retargeting. If I understood you and other sources correctly, retargeting is used for applying same animations to different meshes i.e One BP/Anim graph and one animation set applied to different models.
But I have different animations for each character, i.e I need One BP/Anim graph, different models where each model uses its own animations.
BTW, while writing this message I probably found the solution for that and it’s working:
I simply changed skeleton in child ABP and found that I need to use Sequence/BlendSpace created without dragging animation as node, and now… It’s working? I have Human ABP and child Orc ABP, they both share functionality, but have different animations with different skeletons, all without retargeting. And it’s actually working. Was it that simple?
Why docs says it’s not allowed? Or maybe I misunderstood what it was about?