DataGrid set Filter on Multiple filter column at runtime

I have a DataGrid that receives data from a query, and one of the columns has a selectMultiple filter. Everything works fine.

As you can see from the image I'm passing one of the filters as a parameter to the page. What I need to is to render the datagrid already filtered, without losing the rest of the data. If the user wants he can remove the filter. and see the datagrid with all the rows.

I have tried following the example but the filter is not applied, what am I missing?

Here's my code:

    protected override async Task OnAfterRenderAsync(bool firstRender)
        if (firstRender)
            await GetDemList();
            if (!String.IsNullOrEmpty(statusFilter))
                var column = grid.ColumnsCollection.Where(c => c.Property == "Status").FirstOrDefault();
                if (column != null)
                    column.FilterValue = statusFilter;
                    column.FilterOperator = FilterOperator.Equals;

        if (IdDealer > 0)
            IsDealer = true;

I get the correct value in the filter, but still se all the data not filtered.

and here's what I have for the DataGrid:

<RadzenDataGrid AllowFiltering="true" AllowAlternatingRows="true" AllowSorting="true" PageSize="10" AllowPaging="true"
                            PagerHorizontalAlign="HorizontalAlign.Left" ShowPagingSummary="true" Data="@DemList" TItem="wDem" @ref="grid"
                            LogicalFilterOperator="LogicalFilterOperator.Or" FilterMode="FilterMode.Simple" FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive">
                        <RadzenDataGridColumn TItem="wDem" Property="TitoloDem" Title="Nome Campagna" TextAlign="TextAlign.Left" Width="150px" />
                        <RadzenDataGridColumn TItem="wDem" Property="IdDem" Title="ID" TextAlign="TextAlign.Center" Filterable="false" Width="60px" />
                        <RadzenDataGridColumn TItem="wDem" Property="TipoDem" Title="Area" TextAlign="TextAlign.Left" Width="100px" />
                        <RadzenDataGridColumn TItem="wDem" Property="TitoloCampagna" Title="Tipo" TextAlign="TextAlign.Left" Type="typeof(IEnumerable<string>)"
                                          FilterValue="@SelectedCampaigns" FilterOperator="FilterOperator.Contains" LogicalFilterOperator="LogicalFilterOperator.Or" Width="300px">
                                <RadzenDropDown @bind-Value=@SelectedCampaigns
                                            Change=@OnSelectedCampaignChange Data="@(campNames)" AllowClear="true" Multiple="true" class="w-100"/>
                        <RadzenDataGridColumn TItem="wDem" Property="StartDem" Filterable="false" Title="Data inizio" FormatString="{0:d}" TextAlign="TextAlign.Left" Width="100px" />
                        <RadzenDataGridColumn TItem="wDem" Property="EndDem" Filterable="false" Title="Data fine" FormatString="{0:d}" TextAlign="TextAlign.Left" Width="100px" />
                        <RadzenDataGridColumn TItem="wDem" Property="Status" Title="Stato" TextAlign="TextAlign.Left" Type="typeof(IEnumerable<string>)"
                                          FilterValue="@SelectedStatus" FilterOperator="FilterOperator.Contains" LogicalFilterOperator="LogicalFilterOperator.Or" Width="200px">
                                <RadzenDropDown @bind-Value=@SelectedStatus Style="width:100%;"
                                            Change=@OnSelectedStatusChange Data="@(statuses)" AllowClear="true" Multiple="true" />
                                <Template Context="data">
                                    @switch (data.Status)
                                        case "Pianificazione":
                                            <h6><span class="badge rounded-pill bg-primary">@data.Status</span></h6>
                                        case "Pending":
                                            <h6><span class="badge rounded-pill bg-warning">@data.Status</span></h6>

This most probably should be IEnumerable<string> not string. Check this demo for reference:

The IEnumerable is the Filter Value:

    private IEnumerable<string> SelectedCampaigns;
    List<string> campNames { get; set; } = new List<string>();
    private IEnumerable<string> SelectedStatus;
    List<string> statuses { get; set; } = new List<string>();
    private bool selectedDems = true;

    public string statusFilter { get; set; }
    private RadzenDataGrid<wDem>? grid;

The statusFilter is the Parameter (one or more) that I get from the calling page and that I have to set as selected filters in the Filter RadzenDropDown.

What I need is to set the statusFilter content as active filter before displaying the DataGrid.