Why can't I toggle visibility of IK controls in CR_Mannequin_Body?

Hi everyone,

I’m currently working with the default CR_Mannequin_Body Control Rig asset in Unreal Engine 5. I want to set up both hands to be driven by IK, but I noticed that I cannot toggle the Visible checkbox for certain IK controls in the Details panel.

I tried to set the Visible property of the following controllers to True, but nothing happens.

hand_r_ik_ctrl

arm_r_pv_ik_ctrl

hand_l_ik_ctrl

arm_l_pv_ik_ctrl

How can I use the hand IK controllers?

Any insight would be appreciated — thanks in advance!