Hi Steve,
Music Studio can send MIDI note (and pitch bend) events to a connected hardware, if you mean that by “triggers”.
I suggest that you install and launch Music Studio Lite, connect your Juno (by the way, which adapter/cable do you use?), go to Setup / MIDI, tap the black area where the connected MIDI devices are listed and see if your Juno (or MIDI adapter) is recognized.
If it is, tap “Ports & Channels” and enable MIDI output, then play on the Music Studio keyboard, the notes should be played by the Juno too.
If this works, it will also work with imported MIDI files, but this is something you can’t test with the Lite version, since MIDI files can only be opened by the full version. The App Store doesn’t offer time-limited trials, unfortunately.
Best,
Music Studio Support