Cannot detect Yeelight Color bulb on Yeelight app

I’ve done the reset thing on/off 5 times and the bulb goes to every colour for a few seconds then it turn white. I can find and connect to the Yeelight WiFi router called yeelink_light_color***** but on my Yeelight app I can’t find any device…
I have a OnePlus 6 with Android 9 if it helps

Please help, thanks

Follow the installation steps on the Yeelight app, it will ask you to connect to the Bulb’s wifi.