Whenever completing challenges I think it would be extremely helpful to mark challenges so that you can track progress in-game. For example, if you need 15 kills with a battle rifle, you should be able to track how many kills you have gotten as you’re playing. A way to do this would be by hitting the view or menu button on the Xbox controller.
Even if live tracking progress for a challenge isn’t available, it would be helpful to at least view which challenges you have to complete by pushing the view or menu button on the controller.