Well, I already created this exception. But unfortunately this is a problem - I don't even know what else to do - so with so many measures that I try to apply, there may be things that remain blocked.
I have a spare server for hosting the frontend - If you send me the code privately, I can create a mirror that just contacts your backend to fetch the images.
But in that case, that would require paid Cloudflare load balancing. Otherwise if it's just a separate domain, it's not much reliable compared to using a third-party image host like PostImages.