From what info I gathered about Umling la pass permit is, from 2022 there is no need for permit. You have to pay for Ladakh environment fee that too only via online. Mostly tourist are allowed entry to the pass, but it depends on army allowing or not allowing on that day. Some say pass is much required while entry might also be denied. So if you are to get a permit, especially travel via routes like Hanle to photi la or Hanle to Ukdungle normal pass needs to be obtained. If you are taking Fukche route then permit signed by District magistrate Leh is much needed. You also need Inner line permit in that case. Application is done online. Kindly do recheck the info I have given above through people you know. Happy safe journey.