So as for the no bluetooth support, the main reason it is not supported is because the controlers all use bluetooth to connect to the device unless they are physically attached. Now yes, this is the switch lite, and can't be connected to the tv but they decided to still support connecting those aditional controllers because some people will want that. However the issue is they are doing some non-standard stuff with their bluetooth that means the controllers can technically connect to a PC, but they are glitchy and laggy and not a very good experience. This also in turn means that the bluetooth is dedicated entirely to connecting controllers, and I would guess headphones just don't work quite right. Theoretically this might be something they can fix in the future but who knows.