“Bonjour Broadcasting” is a bit quirky, sometimes. Double check that both devices (your iPad and your computer) are on the same network. Sometimes your Computer doesn’t see your iPad right away, but your iPad can see your computer. Either way works.
You should definitely get a MIDI Monitor (Snoize MIDI Monitor on Mac, this simple one for Windows or MIDI-OX) to figure out what’s going on. With the right tools (like a MIDI Monitor), everything becomes much easier to diagnose.