See here:
https://blazor.radzen.com/datagrid-footer-totals
"Displayed orders: 830 of 830"
That's not correct, and doesn't change when you move to a different page.
Change the footer template from:
Displayed orders: <b>@ordersGrid.View.Count()</b> of <b>@orders.Count()</b>
to:
Displayed orders: <b>@(ordersGrid.PageSize * ordersGrid.CurrentPage + 1) - @((ordersGrid.PageSize * ordersGrid.CurrentPage) + ordersGrid.PagedView.Count()) </b> of <b>@ordersGrid.Count</b>
