I will first tell what I am able to check
if with MidiOX I send to my LaunchPad Pro MK3
F0 7E 7F 06 01 F7 (universal device inquiry)
I get in return from the LP
F0 7E 00 06 02 00 20 29 23 01 00 00 00 04 08 03 F7
Is this used by the zynthian OS to know with which device it is talking
If it is the case , I suppose there is no way to “cheat” the system and have the LP Pro MK3
use the driver of th LP Mini MK3 (with some tweaks of sysex messages adapted)