On other apps connected to my TV I'm able to use eArc and output Dolby Digital surround sound on my receiver. If I cast to my Chromecast I'm able to get it to output Dolby Digital. However when playing a stadia game on my Chromecast, it only outputs stereo. I have gigabit internet, but in the connection tab, I'm only seeing 4k & HDR. There is no icon for 5.1. Do I need to enable this somewhere? Plugging into my receiver yields the same results. Stereo only.