How to show dashboard with device info page in smartapp

You may be running into a known bug that is still lingering (I think a fix was rolling out yesterday / today / tomorrow?). Even SmartTiles installs at the moment are frequently not appearing in the mobile app’s installed SmartApp list.

Here’s one reference, though it may not be the exact same problem. I’d give this another couple days for the Platform guys to confirm fixed before wasting too much time trying to debug. It’s easiest that way for quirks / anomalies like this sometimes.