Show the track of the scrollbar

Description

I would like to show a scrollbar track additional to the scrollbar thumb (which is enabled by default in LVGL). Is it somehow easily possible or do I need to add a floating panel by myself?

Screenshot and/or video

https://ishadeed.com/assets/scrollbars/scrollbar-parts.jpg
From: https://ishadeed.com/assets/scrollbars/scrollbar-parts.jpg

I can’t found build in way. But you van use DRAW event and draw you own bar.