Unreal Engine 5.6, CameraRig Rail "Current Position on Rail" Unable to Be Keyframed in Sequencer

Hello!

Essentially whenever I try to click on Current Position on Rail in order to get the dropdown for it under the CameraRigRail Row in the Sequencer Graph, nothing happens. In the few guides I have seen on Camera Rig Rail, this is the typical process you would do for this workflow to keyframe its current position, but since they are older versions, I am wondering if something changed with 5.6? or if I am missing something else.