Elgato has released Stream Deck Mobile 2.0 with native iPad support, including the full Notation Express XL profiles for Sibelius and Dorico.
Stream Deck Mobile 2.0 brings native iPad support for the first
Get Started with Stream Deck Mobile 2.0 (iPhone/iPad)
Stream Deck Update 6.3 — Support for Stream Deck Mobile 2.0, 6
The BEST Stream Deck Alternatives
Notation Express is now on iOS with Stream Deck Mobile - Scoring Notes
Stream Deck Mobile 2.0 brings native iPad support for the first
Stream Deck Mobile for iOS
Elgato Stream Deck Mobile on the App Store
Stream Deck Mobile 2.0 brings native iPad support for the first
Stream Deck Update 6.3 — Support for Stream Deck Mobile 2.0, 6
Get Started with Stream Deck Mobile 2.0 (iPhone/iPad)