You actually CAN add a client root and manually re-parent the controllers and hmd to it in blueprints, you just call the detach / attach nodes on begin play to set them to the new parent and then it should function as you want.
I don’t provide a native form for , as generally its intended that players be different heights and client side height disassociation may be a bit off putting during game play, even more so considering arm length would not change.