There are updated (January 2026) Power Platform licensing resources now available. The main change is the apparent end of sale of the Power Apps Per App User SL. However, for the moment there’s no official announcement detailing what existing customers need to do, and this licence remains transactable and in the Product Terms.
Grab the updated Licensing Guide here: https://bit.ly/44WG4W7, and its sidekick, the Licensing Deck, here: https://bit.ly/4jnBh5X.