Hi @Anjali_Menon,
If you are using *-base.css theme, the following style should do the trick:
:root {
--rz-scrollbar-border-radius: 16px;
}
Depending on the theme you might have to increase or decrease the value get to the 5px look.
The .rz-default-scrollbars class is used in non -base themes to reset the scrollbars to browser defaults.