If anyone is looking for a solution to this issue, what worker for me was disconnecting the holster mesh (child of the main character mesh) from the leader pose in construction script. I then created it’s own animation blueprint, get a reference to the player mesh in that new anime BP and used a Copy Pose From Mesh node in the anim graph. That node will essentially drive this asset with the same animations as the main character mesh. In that Copy Pose From Mesh node is a checkbox to “Copy Curves”. That made it so this child skel mesh can be influenced by curves from the parent mesh.
Hope that helps someone if this comes up in the future!