Forgive my ignorance, but I don’t use any of those fancy SSGs. If, however, I am correct in assuming that you are deploying to Netlify from the public directory, be advised that you have two links that are looking for the %PUBLIC_URL% directory, which does not exist. This is a placeholder that is supposed to assume some value as specified in your build process somewhere.
<link rel="manifest" href="%PUBLIC_URL%/manifest.json">
<link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
You do have a manifest.json file and a favicon.ico file at the top level of your public directory, so when you fix these links these files will load, which in turn I assume will allow your site to load, too.