Is UE available IK with SPINE?

Hello Everyone!
I’m Creating 2D Platformer Shooting Game.
So I buy Spine 2D Tool for this Technical Skill “rigged using IK to adjust the head and torso when aiming weapons”

But I can not find IK in imported file from Spine!
Spine tool can export with json and Atlas file format.
So UE is not provide IK with json File Format?
If is, we gonna refund Spine.

I don’t think Paper2D has such features unless Spine provides a custom plugin integration.

IK is mentioned. But iirc IK available only in Spine Pro.
Here’s Spine guidline for UE4:
In any case this is question for Esoteric Software. Try to ask on their forums.