I use the body to pose in C3D then export without the Head into Clip Studio as a possible 3D character. Then I animate the head which is 2D with animatable jaw eyes lids etc.in Clip Studio. It's what I,ve been keeping busy with.
I animate in 2D because it takes so much less time to render a 16 sec. Animation. And it is easier for me to create a 2D animated head with moving eyes jaw eyelids etc. than try to achieve it in 3D the bodys are not that hard for me.