Just to add to this, the issue seems to be when you reach content length that means the content is scrollable
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:chart="clr-namespace:Syncfusion.SfChart.XForms;assembly=Syncfusion.SfChart.XForms"
x:Class="SandBox.Views.MainPage">
<NavigationPage.TitleView>
<Label Text="{Binding Title}" FontSize="16" TextColor="White" />
</NavigationPage.TitleView>
<ScrollView BackgroundColor="DarkGray">
<StackLayout>
<StackLayout Orientation="Horizontal" HorizontalOptions="CenterAndExpand" Margin="0,0,0,18">
<Label Text="DATE" FontSize="18" Margin="0"/>
<Frame CornerRadius="5" IsClippedToBounds="true" BackgroundColor="White" Margin="0,1,0,0" Padding="8,0">
<Label Text="01/01/2021" HorizontalTextAlignment="Center" FontSize="16" FontAttributes="Bold" />
</Frame>
</StackLayout>
<chart:SfChart BackgroundColor="White" ChartPadding="0" HeightRequest="320">
<chart:SfChart.Scale>
<OnPlatform x:TypeArguments="x:Double" iOS="1" Android="1" />
</chart:SfChart.Scale>
<chart:SfChart.Margin>
<OnPlatform x:TypeArguments="Thickness" iOS="0" Android="0" />
</chart:SfChart.Margin>
<chart:SfChart.PrimaryAxis>
<chart:CategoryAxis>
<chart:CategoryAxis.MajorTickStyle>
<chart:ChartAxisTickStyle StrokeColor="Transparent" />
</chart:CategoryAxis.MajorTickStyle>
<chart:CategoryAxis.MajorGridLineStyle>
<chart:ChartLineStyle StrokeColor="Black" StrokeWidth="1" />
</chart:CategoryAxis.MajorGridLineStyle>
<chart:CategoryAxis.AxisLineStyle>
<chart:ChartLineStyle StrokeColor="Black" StrokeWidth="1" />
</chart:CategoryAxis.AxisLineStyle>
<chart:CategoryAxis.LabelStyle>
<chart:ChartAxisLabelStyle TextColor="Black" />
</chart:CategoryAxis.LabelStyle>
</chart:CategoryAxis>
</chart:SfChart.PrimaryAxis>
<chart:SfChart.SecondaryAxis>
<chart:NumericalAxis Maximum="5" Minimum="0" Interval="1" >
<chart:NumericalAxis.MajorTickStyle>
<chart:ChartAxisTickStyle StrokeColor="Transparent"/>
</chart:NumericalAxis.MajorTickStyle>
<chart:NumericalAxis.LabelStyle>
<chart:ChartAxisLabelStyle TextColor="Black" FontSize="7"/>
</chart:NumericalAxis.LabelStyle>
<chart:NumericalAxis.AxisLineStyle>
<chart:ChartLineStyle StrokeColor="Black" StrokeWidth="1" />
</chart:NumericalAxis.AxisLineStyle>
<chart:NumericalAxis.MajorGridLineStyle>
<chart:ChartLineStyle StrokeColor="Black" StrokeWidth="1" />
</chart:NumericalAxis.MajorGridLineStyle>
</chart:NumericalAxis>
</chart:SfChart.SecondaryAxis>
<chart:SfChart.Series>
<chart:RadarSeries ItemsSource="{Binding RadarData}" EnableTooltip="True" EnableAnimation="True" XBindingPath="Name" YBindingPath="Value" Opacity="0.8" DrawType="Area" Color="Aqua" />
</chart:SfChart.Series>
</chart:SfChart>
<StackLayout>
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
<Label Text="Lots more content here..." />
</StackLayout>
</StackLayout>
</ScrollView>
</ContentPage>