Ive set up Battery 4 on a track in Logic and selected an instance of 16 stereo channels, yet Battery 4 is only showing 4 stereo outs
I can't figure out what's going on?
You can setup how the output are configured in Battery’s preferences.
Probably now it is setup as Custom (you have 4 stereo out and 24 mono, which is in any case 32 outputs).
Go in Preferences under Engine and you’ll find there the setup