I've created a system on my site where I can upload photos to the Pixelfed instance I'm on and then pull the photo and content back down and post it on my site. Known as PESOS on the #indieweb. I'm using #11ty and the brilliant utility 11ty/eleventy-import. The utility pulls in the Atom feed from my Pixelfed instance at build time. I also had to figure out how to create a page template to use the metadata the import utility pulls down. Added bonus was discovering a few things on site that weren't necessarily broken, just needed some tuning up.