Hey @Nouf, sorry we can not add it unless the artist/label wants to have it on Deezer, 

more info here 

Hi there are songs that are from Artists on Deezer that are not there. For example Harry Styles has some songs (Medicine, Him, She's dressed as a Banana.etc) that ate not on the app, you are able to listen to these songs on Spotify or Soundcloud so it would be nice not to have to move to another app to listen to songs from the same artist