Does this guide eliminate google play services? If not, then you still don't really control it. For reference, on my Pixel 6 Pro, GrapheneOS gets 2x the advertised battery life until you add Google Play Services back into a sandbox. At that point, it gets advertised battery life.
I assume the TVs Google backdoors are even worse (video scraping, etc, etc) since they are not power constrained.
Just install microG or Mind the Gapps
I had no idea google play services uses that must power. Another good reason to get rid of it.