data grid self-reference hierarchy does not consider all available data in grid to filter, instead it only give where report_to_id is null in used example in Site at Radzen blazor components which mean filter only consider
protected override async Task OnInitializedAsync()
{
await base.OnInitializedAsync();
employees = dbContext.Employees.Where(e => e.ReportsTo == null);
}
and not include data from row expand
