I've searched and searched, so now I post.
Are there instructions somewhere to program the new FIOS TV One remote for a specific TV? In my case that would be an LG TV.
Here is the exact way to get there...
Go to Menu > Settings > Voice Control > Fios Voice Remote > Program Voice Remote > Manual Setup.
Once there it will ask for your TV brand and just follow the setup.
Does NOT work. Tried many times with different codes and tried MANUAL many times. Verizon swapped the remote and I repeated all the numerous times again. No success! Appears there is a software issue not solved yet. My old remote works fine with my LGs. So..... I have new TV One without Voice Control. It is still worth keeping. Maybe new software will still solve in future updates.