I made a video about the Liquid Glass slider and how in WWDC 26 it looked different from OS 27.

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If you want to understand the full context, I suggest you watch the video. But simply, the thumb (the Liquid Glass bubble) is in the middle of the picture above, and the left part is not blue. That is what we saw at WWDC 26. So it acts differently from a normal slider in iOS. Below is a screenshot from iOS 27 where it is displayed just like a normal iOS slider.

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Now, after the September Apple Keynote, I found out that around 27:45 Kaiann Drance speaks briefly about new iOS 27 features and mentions the Liquid Glass slider.

And now it is a normal iOS slider. But it has different photo example. Inline Image Description