Which action did you choose? For set_color or set_color_tempreture, only color bulb or light strip applies, if you only have a white bulb, then you will see "options unavailable". For "set_scene", you have to create one through Yeelight app.
BTW, did you switch your bulb to Singapore server? You need to change your locale (in settings--> locale) in your Yeelight app, reset your bulb and re-connect it.