Send video to Google Cast and keep audio on iPad

I recently subscribed to Infuse Pro but I still can’t find a configuration to fit my needs.
I have an iPad with Infuse Pro and a Google/Chromecast 3rd gen (latest) that’s hooked on a monitor (no audio).
So I want to have the audio remain at the iPad and the video to be casted on the Chromecast.
But it keeps casting both streams to the Chromecast and I don’t see any option to keep it at the iPad, is it possible?
Thank you

This is not supported at this time, but I’m moving this to suggestions.