I created a Model for custom form element

using System.ComponentModel.DataAnnotations;
using EPiServer.DataAbstraction;
using EPiServer.DataAnnotations;
using EPiServer.Forms.Core;

namespace Teknos.Web.Models.Forms
{
    [ContentType(
        DisplayName = "GA4",
        GroupName = "Custom Form Elements",
        GUID = "A4C339B1-1BDD-43D0-AF0D-994A2DA4F82F")]
    public class GA4_CustomFormElement : ElementBlockBase
    {
        [Display(
            GroupName = "Data Layer Properties",
            Order = 1,
            Name = "Form Type",
            Description = "Type of form"),
         CultureSpecific]
        public virtual string FormType { get; set; }
    }
}

Then I created a view in modules\_protected\EPiServer.Forms\Views\ElementBlocks\GA4_CustomFormElement.cshtml
which contains a vue component with following code

@inherits System.Web.Mvc.WebViewPage

<google-analytics-data-element></google-analytics-data-element>

I can see the element in CMS, I can add it and see it rendered so all good. Only thing now missing is how to I attach Model of <GA4_CustomFormElement> type to it ?
Other basic form elements are ascx files which inherit ViewUserControl. How do I add my custom block as Model to this?