Image Metafield as Dynamic Content

As you can see in the screenshot there is a content section which I can add in the page. Recently I added a metafield and selected the type image in it, now that metafield is not available in dynamic content section.

I want to know how can I do that with liquid code or some

You can Install the Metafields Editor app to make this happen

I dont think content box can have images as input, you need to create the metafield with type page or text.