Saving/copying edited images from Generative Fill

I'm using Safari with iPadOS 16.6.1. I create an image using text to image on my iPad, then go to Generative Fill. I want to remove the background and just have the foreground object on a transparent background. Easy enough, but once I have done that, then what? I'm trying to either copy the edited image or save it so I can then open it in another app, but every time I try to do that, the image copied/saved still has the original background in it. If I try to back out of Generative Fill, it takes me back to the Firefly home page and I lose all of my work. How can I access the edited image with the background removed? Am I missing something obvious?