2D animation software compatible with UE4

Hi.

I wanted to ask to people out there to see if anyone can help me.

Is there any software out there for 2D animation that has a UE4 plugin/runtime/compatibility?

Also related is, how would I be able to use Inverse Kinematics for paper2D without a proper software supporting that feature?

I’m interested in using UE4 to build powerful 2D games but I’m struggling to find information about properly animating things for UE4 that can possess features such as IK.

Any help would be appreciated.

Thanks