How Do I Code A Component to Show Different Child Element's Attributes of Base Class

I am trying to organize many different request forms into objects.

I am a little too novice to understand how to orient the objects but I kind of understand the behavior I want.

for example

public class RequestForm
{
    public string Name {get;set;}
    public DateTime CreateDate {get;set;}

    public void Submit()
    {
    }
}
public class PTORequestForm : RequestForm
{
    public DateTime StartDate {get;set;}
    public DateTime EndDate {get;set;}

    public void Submit()
    {
        do x
    }
}

public class ChangeDeptRequestForm : RequestForm
{
    public string NewDeptName {get;set;}

    public void Submit()
    {
        do y
    }
}

All implements save to the database a record that has a discriminator and a field for the request converted to JSON

Everything seemed fine so far in my developing this and I started to wonder how I display the information.

I'm working in blazor so I have a component that renders the db model and then another component inside it that loads the deserialized request.

private RequestForm request {get;set;}
public override task OnInitializeAsync()
{
    request = JsonSerializer.Deserialize<PTORequestForm>(jsonData)
}

I'm not able to then do

<span>@request.StartDate</span>

What patterns should I look at or what am I doing wrong or missing preventing me from displaying the information correctly? Or do I need to make a .razor for every request type instead of something generic enough to handle the different child objects?