Stream deck can now be used with an ipad, but if I understood correctly, instead of a dedicated control app like the desktop it is required to be embedded in the apps.
I checked it with the Stream Deck Connect test buttons and the response is amazing. Also tested with a Video editing app
No, the stream deck mobile is for controlling the desktop using your iPad or iPhone or android instead of a physical stream deck. The Stream Deck Connect allows to control the iPad from the stream deck