If it has all of:

a "big banner image", buttons that are required to interact or dismiss, doesn't go away on its own after only a couple seconds, and might(?) also exist in the notification center

I think it's pretty safe to label that "definitely not a toast". That's just a notification, or maybe a "non-modal alert". Toasts are distinct from those by being brief and ephemeral.

It is technically a toast, according to Microsoft. If you check the link in my previous comment, the script is using the Windows Runtime Toast Notification API, specifically the Windows.UI.Notifications namespace and the ToastGeneric XML toast template.

You can see the API reference here: https://learn.microsoft.com/en-us/uwp/api/windows.ui.notific...