I can only speak for what worked for me. A shorthand heuristic might be that if the resume can be read in linear fashion by a screenreader without any weirdness or non sequiturs, it's probably pretty good (another argument in favor of paying attention to accessibility!)

In my case, I had a simple layout with sections clearly delineated and very simple formatting (bulleted lists). Dates were spelled out eg September 2024 rather than 9/24. UTF-8 throughout. No difficult latex packages, just classic ones like enumitem and fancyhdr.