I.. I don't know where I was going with this one :)
This was made with the Midjourney editor. Funny thing, the blank space in the original png was immediately selected as the inpainting area in the editor. I didn't even need to select the flag area to get started, nice work!
But the content moderation is a lot stricter than the normal text-to-image option. I can understand it from their perspective, but it can be a big annoyance when your image seems perfectly fine but is still blocked by the filter AI 😑