M2 & M3

I bought 4 m2 and 4 m3 spot lights. And Want to test the difference between them… and I found that the m2 don’t work without the mesh,but the m3 was directly connected to the Xiaomi router (AX6000) for networking. After buying the mesh, m2 can also be used.
I think m3 is more convenient in this way, so I went to ask the customer service whether there is such a difference in connection, but the customer service clearly stated that m2 and m3 are connected in exactly the same way! This is just an accident! But all m3 lights I bought can work in this way… it should not happen occasionally.
I want to ask for help. Is there anyone who knows relevant knowledge and can popularize it?