My webOS firmware

My Webos TV is a S32VAHW it is a sansui tv. Supposed to be 5.0 version but it has a narobi version OS since I bought it online. I am in United States & was trying to figure out can I upgrade firmware cause it’s very limited I can’t even get the voice function to even work plz help me & I’d like to put the homebrew on it if I could also get some help with that. When I bought the TV it said it had voice assistant but I’ve yet to figure out where cause there is no app to that function anywhere I have found…