Repeating tracks

HI All, I have been a sonos user for many years (like 7 years)  and have multiple Sonos devices thru out my home. I subscribe to both Pandora and Spotify, when I am controlling my Sonos thru my cell phone app I am able to repeat tracks, when I use my Ipad ( my designated device) for my Sonos system the Repeat / replay Icon on the Ipad is “grey” so it does not do anything. If someone can help me with this it would be most useful. Thank you Sean