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I mean a default scroll bar for using with panels or gridviews (unfortunately you don't have something like the default winform VScrollBar/ HScrollBar, only the SfScrollFrame).
The thumb [scrolling button] size should be accessible, so it would be possible to implement the following for a vScrollbar by our self easily:
Show only the thumb (it would be possible to use a default button here and use the accessible size of the thumb) and by hovering over it, show the complete scrollbar (for i.e.: button.visible = false, vScrollbar.visible = true) as the MS developers implement it like in OneNote/ Calculator etc.
(It would be great, if you have the option to use a scrollbar with or without the arrow buttons.)
1.Default (just showing the thumb):

2. Show the complete scrollbar (arrows included here).

(I realized that it could be lagging in specific situations, if you resize the scrollbar for i.e. with a timer, so we could choose, if we just use things like "button.visible=false & vScrollbar.visible=true".)