MIDI Bass app for iOS?

I’m brand new to the MIDI Guitar 2 app world (tried the free version last night for the 1st time on my iPad), I’m a long time Fishman TriplePlay user on guitar, but I’m mostly a long time 5 & 6 string bassist (been gigging for over 42 years), I was looking for a MIDI to audio solution for bass, but not wanting to wade into the Roland GK-3B territory… I recently bought a Squire Bass VI for fun/different tones/easier short scale, and was wondering why the MIDI Bass app, seems to not be on iOS, but MIDI Guitar 2 is… does anyone know why?

No one, not even @jamorigin ?