Yeelight downlight offline

Just bought yeelight downlight YLSD04YL 4pcs and paired them with my Mi Hub Control - Gateway Version 1 successfully, however, after pairing them, they appeared as offline.

I cannot set up my downlight or set an automation with my aqara wireless switch or any automation at all. could anyone help me? do I need to buy a new gateway with bluetooth mesh compatible? is my gateway not compatible? thanks in advance

I have amazon alexa. is she compatible? thanks