Arylic B50 SE and Alexa

I recently bought the Arylic B50 SE because I could connect passive speakers to it and then use Bluetooth to play music to them. My iPhone finds the Arylic device perfectly fine, but when in Bluetooth mode, my Alexa discover is not able to locate the Arylic device. Even when next two each other. Is Alexa Echo to Arylic B50 SE Bluetooth connection not supported? Thanks!