Can someone point me in the right direction? To set up a step sequencer Audio unit extension app, do i use the Apple provided MIDI Processor AU extension Template? And if so how would I access it via GarageBand?

Hello, As above, I can play a MIDI sequence in my plugin using various examples scrounged from the internet, is it possible to record the MIDI notes in a DAW? Alternatively, can the piano keyboard in GarageBand provided to the AUV3 plugin be automated? Is there a forum somewhere that specialises in AUV3 development?

Ive Just built a AUV3 MIDI Processor app, using Apple template for (AudioUnit extension app) The AUV3 instance is not appearing in GarageBand while using iPhone, iPad and m1 Mac mini. Using Xcode 14.2 If I create a AUV3 Instrument, the instance works fine and I can find it. Any ideas ? thanks