https://www.whitehouse.gov/presidential-actions/2025/01/restoring-names-that-honor-american-greatness/
https://www.theguardian.com/us-news/2025/jan/20/trump-executive-order-gulf-mexico

"(b)  Within 30 days of the date of this order, the Secretary of the Interior shall, consistent with 43 U.S.C. 364 through 364f, reinstate the name 'Mount McKinley.'  The Secretary shall subsequently update the Geographic Names Information System (GNIS) to reflect the renaming and reinstatement of Mount McKinley.  The national park area surrounding Mount McKinley shall retain the name Denali National Park and Preserve."

The order is signed, and the territory is not disputed.