You can expect it to not work. SteamOS is not designed or meant for installation as a generic OS. It is only designed to run on the specific supported hardware

You can expect it to not work. SteamOS is not designed or meant for installation as a generic OS. It is only designed to run on the specific supported hardware devices that it comes preinstalled on. No matter how many times you see LTT install it on a system they have assembled, its not supposed to be used that way and not supported.