My Model is : (Problematic section is Variant[] Variants, that is not passing to controller)

public class SingleProduct
{
    public Product1 product { get; set; }
}
public class Product1
{
    [JsonProperty("title")]
    public string Title { get; set; }
    [JsonProperty("body_html")]
    public string Body_html { get; set; }
    [JsonProperty("vendor")]
    public string Vendor { get; set; }
    [JsonProperty("product_type")]
    public string Product_type { get; set; }
    [JsonProperty("status")]
    public string Status { get; set; }
    [JsonProperty("variants")]
    public Variant1[] Variants { get; set; }
}
public class Variant1
{
    [JsonProperty("price")]
    public string Price { get; set; }
    [JsonProperty("weight")]
    public double Weight { get; set; }
    [JsonProperty("inventory_quantity")]
    public int Inventory_quantity { get; set; }
    [JsonProperty("weight_unit")]
    public string Weight_unit { get; set; }
}

Currently using this View Code to Create :

@model SingleProduct

        <form asp-action="PostApi">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            
            <div class="form-group">
                @Html.LabelFor(model => model.product.Title, new { @class = "control-label" })
                @Html.TextBoxFor(model => model.product.Title, new { @class = "form-control"})
                @Html.ValidationMessageFor(model => model.product.Title)

            </div>
            <div class="form-group">
                @Html.LabelFor(model => model.product.Body_html, new { @class = "control-label"})
                @Html.TextBoxFor(model => model.product.Body_html, new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.product.Body_html)

            </div>
            <div class="form-group">
                @Html.LabelFor(model => model.product.Product_type, new { @class = "control-label" })
                @Html.TextBoxFor(model => model.product.Product_type, new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.product.Product_type)

                <input type="hidden" name="product.Status" value="active" />
                <input type="hidden" name="product.Variants.Weight_unit" value="lb" />
              
            </div>           
            
            <div class="form-group">
                @Html.LabelFor(model => model.product.Variants.SingleOrDefault().Price, new { @class = "control-label", @required = "required" })
                @Html.TextBoxFor(model => model.product.Variants.SingleOrDefault().Price, new { @class = "form-control", @required = "required" })
                @Html.ValidationMessageFor(model => model.product.Variants.SingleOrDefault().Price)
            </div>
            <div class="form-group">
                @Html.LabelFor(model => model.product.Variants.SingleOrDefault().Compare_at_price, new { @class = "control-label", @required = "required" })
                @Html.TextBoxFor(model => model.product.Variants.SingleOrDefault().Compare_at_price, new { @class = "form-control", @required = "required" })
                @Html.ValidationMessageFor(model => model.product.Variants.SingleOrDefault().Compare_at_price)
            </div>
            <div class="form-group">
                @Html.LabelFor(model => model.product.Variants.SingleOrDefault().Inventory_quantity, new { @class = "control-label", @required = "required" })
                @Html.TextBoxFor(model => model.product.Variants.SingleOrDefault().Inventory_quantity, new { @class = "form-control", @required = "required" })
                @Html.ValidationMessageFor(model => model.product.Variants.SingleOrDefault().Inventory_quantity)
            </div>

            <div class="form-group">
                @Html.LabelFor(model => model.product.Variants.SingleOrDefault().Weight, new { @class = "control-label" })
                @Html.TextBoxFor(model => model.product.Variants.SingleOrDefault().Weight, new { @class = "form-control" })
                @Html.ValidationMessageFor(model => model.product.Variants.SingleOrDefault().Weight)
            </div>

            <br/>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>
 

My Controller is: (I want to recieve all data binded to model, but Varient list does not appears)

public ActionResult PostApi(SingleProduct model)
{
    //Here model does not outputs Variants Data...
}

Here is the sample of my Json String, I want my View to produce on HttpPost Request :

{
    "product":
    {
        "title": "BiCycle",
        "body_html": "Body of Battery",
        "vendor": "Burton",
        "product_type": "Product",
        "status": "active",
        "variants":
        [
            {
            "title": "Default Title",
            "price": "500.00",
            "grams": 45,
            "weight": 22.0,
            "inventory_quantity": 23,
            }
        ]
    }
}