scrollBehavior

a FloatingToolbarScrollBehavior. If provided, this FloatingToolbar will automatically react to scrolling. If your toolbar is positioned along a center edge of the screen (like top or bottom center), it's best to use this scroll behavior to make the entire toolbar scroll off-screen as the user scrolls. This would prevent the FAB from appearing off-center, which may occur in this case when using the isExpanded flag to simply expand or collapse the toolbar. Note that the toolbar will not react to scrolling in case a touch exploration service (e.g., TalkBack) is active.