Few TVs pass HD audio. My workaround is to set the PS4 and if need be the TV to Stereo or PCM. That usually works. If not the PS4 audio has to be sent directly to the soundbar.
https://www.vizio.com/audio/home-theater/sb3621ne8.html notes Bluetooth so maybe that?
Verizon Fios box
PS4 Slim (gaming unit); HDMI out to TV
RCA 48” HDTV, with digital audio (coaxial only) output.
Vizio Soundbar, model sb3621n e8
I’m not getting any sound from my soundbar when I watch regular TV programming—Only from the TV monitor’s speaker.
I have the TV digital audio out (coaxial) going into the digital audio in (coaxial) to the soundbar. Best Buy told me I would be able to get the PS4 audio and regular TV audio thru the soundbar this way.