The scrollbar is automatically rendered element by the browser when overFlow is set the scroll. Currently, we have no access to that element in order to style it or make it stick at the bottom of the viewport.
What we can recommend in this case is to make the Grid height 100% and make it vertically scrollable. This will make the Grid to take all of the available space on the screen and the horizontal scrollbar will be always visible:
Let me know if you need more information on this matter.
Five days of Blazor, Angular, React, and Xamarin experts live-coding on twitch.tv/CodeItLive, special prizes, and more, for FREE?! Register now for DevReach 2.0(20).