Apple Tv app sound not working.

I have an fire tv adapter for my projector, and i’ve recently downloaded apple tv on my fire tv. Every single other app sound works on my tv and the sound on the apple tv app on my phone works just not on my projector. I’ve gone to all the settings on it and have reset and everything it still just doesn’t work. I don’t think it will honestly. If i have to watch on my phone i suppose its ok but any help will be appreciated.