no, it's not an image it's a built in sketch object.
as i understand correct, I had been opened evernote and start sketching, after I finished I press the "Done" button but sketch didn't appear in a body of my note. After a while I switched to another note and return back - nothing was appeared. But for some reason preview looks quite correct. And it's stil shows me my sketch I lost (( (scrn. attatched)
I've already re-draw my sketch, but it seems like a bug case.
iOS 14, ipad