Hi @skycryer. I researched this a lot, reading all the specs by LG, even for other models. Unfortunately there is no API access to those functions. And as the standard by LG does not cover it, there probably never will be access to those, either.
Workaround II: Use infrared for controlling these functions.
It’s sad but the support is not that well. Small side tip: The standard was made for LGs Remote Control App (I use it on Android). If you cannot find a feature there, you won’t find it in the standard, thus this binding.
If you are super fancy, you could try to control the mouse cursor from openhab. The buttons are always at the same position so you would have a good chance to get everything to work this way.