I have same issue. I am using v 17.1.0.42.
This is my code:
<sfPopup:SfPopupLayout x:Name="pupServices" IsOpen="{Binding DisplayPopUp}">
<sfPopup:SfPopupLayout.PopupView>
<sfPopup:PopupView HeaderTitle="Popup">
<sfPopup:PopupView.ContentTemplate>
<DataTemplate>
<Label Text="Sample text for now."
BackgroundColor="White"
TextColor="Black" />
</DataTemplate>
</sfPopup:PopupView.ContentTemplate>
</sfPopup:PopupView>
</sfPopup:SfPopupLayout.PopupView>
<sfPopup:SfPopupLayout.Content>
<Grid HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
<!-- Categories ListView -->
<ListView x:Name="lstCategories"
ItemsSource="{Binding Categories, Mode=OneWay}"
VerticalOptions="Fill"
HorizontalOptions="Fill">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<sfBorder:SfBorder
BorderColor="{StaticResource GridRowBoxColor}"
HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"
BorderWidth="0"
Margin="8,8,8,0"
CornerRadius="6">
<Grid HorizontalOptions="FillAndExpand"
VerticalOptions="FillAndExpand"
RowSpacing="0"
ColumnSpacing="0"
Padding="0">
<Label Text="Some content here." />
</Grid>
</sfBorder:SfBorder>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
</sfPopup:SfPopupLayout.Content>
</sfPopup:SfPopupLayout>
Regards
Naweed