An elementary feature native to the iOS experience since launch.
This question gets asked all the time. And everytime it is redirected to the original post, marked "Not Right Now".
I doubt this is an app-breaking feature. It is a QoL improvement that makes the app consistent across platforms. Does Spotify have some secret deal with Apple to give other OS users an inferior UX? I doubt that as well. I imagine more "pressing" features are being requested (like Behind the Lyrics, because that's very important) and this one has been tabled indefinitely because Spoitfy doesn't believe there is enough demand.
I will keep making these posts until whatever developers in this company finally believe there is.