How to make positioning with buttons float and stop like Spotify app

[eoinparkinson]

Is it possible? See two photos below:

!

The SHUFFLE PLAY button in the app floats at first, but after scrolling, as it hits the top of the screen, it stays there, while the list continues to scroll. I know floating buttons are possible, but is a floating button that moves with scrolling and then making it not go out of frame. Do you understand me?

Thanks

[actech]

It is not possible yet.