I don't think most maintainers are opposed to LLM-generated bug fixes or solutions _in general_, just the ones that are pure slop: Generated end-to-end by a Claude-maxed computer enthusiast who thinks that enough green boxes on their GitHub profile means they can somehow BS their way into a high-paying FAANG software engineer position. (Spoiler: it won't work.)

If I got a PR for one of my projects where the fix was LLM-generated, I wouldn't dismiss it out of hand, but I would want to see (somehow) that the submitter themselves understood both the problem and the solution. Along with all the other usual qualifiers (passes tests, follows existing coding style, diff doesn't touch more than it has to, etc). There's likely no one easy way to tell this, however.