Ipad 9th Generation and Nano Cortex with Headphones

Hi, anyone know how to get the ninth generation iPad to work with the Nano Cortex? I want to be able to use the iPad for the metronome and Amazing Slow Downer app to practice through headphones connected to the Nano.

I’ve tried a USB C to lightening cable directly to the iPad and also through the Apple camera kit. I can hear the Nano through the headphones, but everything on the iPad comes through the iPad speaker. Also, Garage Band doesn’t seem to recognize the Nano.