I use YouTube tv but rarely watch any of those channels. Just did a quick test and got center channel audio on TMZ and General Hospital but not Ellen or Dr Phil. How in the hell people watch this stuff I have no idea.
As an aside, is it worth upgrading to a newer receiver that supports ARC/EARC with a 5.1 (to be fair, I don't have a dedicated sub) setup? I'm currently having to use the optical out to my older Onkyo receiver. It all sounds good to me but there's always that sense of "I'm missing out on a thing that's better!".
Yes, worth the upgrade, if you have a newer TV that has eARK/ARK. Its better from a cable management perspective, eARK/ARK allow audio and video data to go back and forth between your TV and receiver, instead of just one way. You connect your TV to the receiver with only one cable (via eARK/ARK), then all accessories (Blu-ray, cable, etc.) to your receiver and use your receiver to switch inputs. Play apps from your TV, or something from one of the accessories and it all goes through the receiver. Additionally, eARK has way more bandwidth and allows you to get the most out of all the advanced sound processing (like Atmos, etc.) vs. optical.
Having said all that, I'm no expert. I've gone from zero to just enough knowledge to be dangerous in 2 months here. I revamped my man-cave and fell ass-backwards into a high-end receiver (didn't know it was high-end at the time) from an audiophile friend of mine. Learned it was "high-end and complicated" when I got my new TV and had to hook the thing up on my own. Took me 3 days to get the thing working on my 5.1 (had to go into sub-menus and erase all the previous owners settings), and went down the rabbit-hole of home theater. Next step will be to upgrade my speakers.