how to enable smart and slow lightly alarm

hello i just received and installed my yeelight led bulb 1s,
it works impeccably on the other hand the yeelight app I find it very badly screwed up … I had read everywhere and seen on youtube that you can set an alarm clock gently with the lights that come on slowly in the morning, I have nice searched I can’t find the function, could you enlighten me (no rotten pun) please
also there is a multitude of scenarios without any explanation and with just an image, would there be an FAQ or an official (or unofficial) notice of each menu of the app? because once again it is very poorly done
thank you in advance !