Set cell background color based on API response

[SergeyChtcherbakov]

I have DataGrid in Xaml

<ScrollView 
                            Orientation="Horizontal" 
                            HorizontalOptions="FillAndExpand" 
                            VerticalOptions="FillAndExpand"
                            Margin="15,0,15,0"
                            VerticalScrollBarVisibility="Never">
                            <dg:DataGrid
                                x:Name="SampleGrid"
                                ItemsSource="{Binding SampleResults}"
                                HeaderHeight="50"
                                RowHeight="70"
                                BorderColor="#CCCCCC"
                                HeaderBackground="{StaticResource AccentColor}"
                                HeaderTextColor="{StaticResource BaseTextColor}"
                                HorizontalOptions="CenterAndExpand">
                                <dg:DataGrid.HeaderFontSize>
                                    <OnIdiom  x:TypeArguments="x:Double">
                                        <OnIdiom.Tablet>15</OnIdiom.Tablet>
                                        <OnIdiom.Phone>13</OnIdiom.Phone>
                                    </OnIdiom>
                                </dg:DataGrid.HeaderFontSize>
                                <dg:DataGrid.RowsBackgroundColorPalette>
                                    <dg:PaletteCollection >
                                        <Color>#F2F2F2</Color>
                                        <Color>#FFFFFF</Color>
                                    </dg:PaletteCollection>
                                </dg:DataGrid.RowsBackgroundColorPalette>
                            </dg:DataGrid>
                        </ScrollView>

I want to be able to set the background color dynamically based on API response. Columns are also dynamic.

// add columns to data grid
                    foreach (var column in uniqueColumns)
                    {
                        colCollection.Add(new DataGridColumn
                        {
                            Title = column,
                            PropertyName = $"Prop{uniqueColumns.IndexOf(column) + 1}",
                            Width = 100,
                            CellTemplate = new DataTemplate(() =>
                            {
                                return new ContentView
                                {
                                    HorizontalOptions = LayoutOptions.Fill,
                                    VerticalOptions = LayoutOptions.Fill,
                                    Content = new Label 
                                    { 
                                        TextColor = Color.Black
                                    }.Bind(Label.TextProperty, $"Prop{uniqueColumns.IndexOf(column) + 1}")
                                }.Bind(ContentView.BackgroundColorProperty, $"Prop{uniqueColumns.IndexOf(column) + 1}Colour", BindingMode.Default, new HexToColorConverter());
                            })
                        });
                    }

                    sampleGrid.Columns = colCollection;

I've set the flag Forms.SetFlags("Markup_Experimental"); to Bind like this. I tried Grid instead of ContentView but nothing works.

In my understanding, the code above is the same if I use cell CellTemplate in XAML as in the example. But it won't work.

<dg:DataGridColumn Title="Streak" PropertyName="Streak" Width="0.7*">
          <dg:DataGridColumn.CellTemplate>
            <DataTemplate>
              <ContentView HorizontalOptions="Fill" VerticalOptions="Fill" 
                           BackgroundColor="{Binding Streak,Converter={StaticResource StreakToColorConverter}}">
                <Label Text="{Binding Streak}" HorizontalOptions="Center" VerticalOptions="Center" TextColor="Black"/>
              </ContentView>
            </DataTemplate>
          </dg:DataGridColumn.CellTemplate>
        </dg:DataGridColumn>

Any help appreciated.
The values of the data I set using reflection, as all columns are dynamic.