The iframe widget URL interpolation does not currently work with entity properties of type URL (such as {{ .entity.properties.link }}), because the widget enforces a literal https:// prefix even when the interpolated value is already a full URL.

This forces a workaround to create a separate string property for the URL, without the https:// prefix, and then hardcode https:// in the iframe widget URL. This is confusing and hard to maintain.

Request to allow iframe widget URLs to interpolate URL-typed entity properties directly by validating the final resolved URL rather than requiring a literal https:// prefix.