Developer ustwo games just upgraded both Monument Valley: Panoramic Edition and Monument Valley 2: Panoramic Edition with full controller support which should get them bumped up to Steam Deck Verified status.
Read the full article here: https://www.gamingonlinux.com/2025/04/monument-valley-1-and-2-get-full-controller-support-which-should-get-them-steam-deck-verified-soon/