Content Not showing on preview

[saleemhaq]

Create content on admin side but when i preview that It not show any thing I working with decouple cms:
Anyone share with me the syntax so it call properly the flow based page in .cshtml:

Call like that synatx below:

@page "/article/{alias}"
@inherits OrchardCore.DisplayManagement.RazorPages.Page

@{
var article = await Orchard.GetContentItemByAliasAsync(Model.Alias);
ViewData["Title"] = article.DisplayText;
}

@article.DisplayText

var blogPost = await Orchard GetContentItemByIdAsync(Id);

@Html.Raw(await Orchard.MarkdownToHtmlAsync((string)article.Content.MarkdownBodyPart.Markdown));

@functions {
    [FromRoute]
    public string Alias { get; set; }

}

but the flow section not properly show:

[Piedone]

You'll need to add and configure Preview Part for the content type for Content Preview to work in a decoupled app.

[saleemhaq]

Please advise based on screen shot below I unable to achieve?