You’ll need at the least, a camera connection dongle with an additional Lightning input for power. Is yours a Lightning based iPad, or the older long connector? Bit harder to find those old connectors.
Does your iPad have 1/8” headphone out? If not (I know the newer iPhones don’t have one, not sure if newer iPads dropped it, I’m on an old Gen6) you’ll need one with USB, Lightning and a 1/8” audio out too…
I believe I have the #1 adaptor that’s in the above post. Works fine.
An arranger is just a tool. What matters is what you build with it..!