Connecting Alexa with Wiim Amp

Hi Everyone,
Does anyone know how to connect my Alexa enabled device with my Wiim Amp? I've connected my Alexa account in my Wiim App but I can't see the Wiim Amp in the Alexa app. I've tried redoing this multiple times but nothing seems to work. In fact, in the Alexa app when I try to add the device from the list, the only device that appears is a Wiim speaker.