can't control volume on my tv with my iPhone apple tv control

I have 3 apple tvs. All LG OLED tvs - webs up to date on all tvs, apple tvs all up to date, sonos sound bars connected to all tvs. One tv I connect my iPhone control center apple tv control to and it works perfectly - controls everything including volume. The other two it controls everything but volume or anything to do with volume including mute. sonos is plugged into arc port, CEC is on on the tvs. On the two tvs that I can't control volume, the apple remote controls volume fine. I have been googling and trying things for a week now and nothing works. They are all appletv 4k latest, however I did buy the one that is working a few months before I bought the other two. All bought directly from apple. When I first plugged one of the apple tvs that I can't control volume in, it worked... until I turned it off and then the next day it did not work anymore. I have tried resetting the tv completely, I just tried a brand new apple tv that I hadn't got around to setting up yet and same, no volume control, so didn't work at all... I guess I can try the non working apple tv in the tv with the appletv that does work - and if it still doesnt' work take everything into the apple store and try to get them to figure it out... unless anyone has any ideas? But I have literally tried every solution I found on google and nothing has worked... so any way out there ideas? thanks

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