New to ios

I've had pianoteq 8 for a while but just realised that an iPad would be easier to use and work better than my windows laptop which crackles a bit and was never really happy with.

Using a kawaii ca67 with 10th gen iPad. Have a usb b to usb c lead which iPad recognises. What's the best way of connecting my Sennheiser Hd 598? I read I might be able to play the audio back through the headphone jack on on the kawai but can't see any options for this in pianoteq iOS?