Pairing with Miband 4

I have a Bedside Lamp 2 (the one with wifi and Bluethoot) since a long time, I paired it with a Miband 2 first and then with a Miband 3, without any problem.
Now I bought a Miband 4, and there’s no way to pair it to the lamp. No matter the settings of the Miband 4, I tried everything, the Lamp doesn’t find it.

I tried Both Yeelight and MiHome apps (on iOS).

Any idea?