I can pass a technical interview just fine to prove my abilities. I don't get into pissing contests with others about GH contribs or FOSS project badges.
If someone can't prove their skill at coding beside pointing to their Github, or if they think that code contribs are some kind of badge of honor, I tend to look down on them. Being anti-LLM just to maintain the special green-box-based internet points they've built up in their head to feel better, is worthy of at least 'scare quote' derision imo.
With some effort OP could review it manually and then try to submit it though.
But QEMU uses a mailing list for development, it's tedious to set up and then later keep track of. I now fundamentally refuse to contribute to projects that use mailing lists for development, the effort it takes and the experience is just so horrible.
Especially if it's a small patch that doesn't concern anyone (any big sponsors), you'll probably never get a response. Things get lost easily.
2) I sent the patch to MacPorts which is what I was using and also had failed builds, and the maintainers closed my submission as a dupe (of a ticket which actually didn't have the full patch nor anyone testing it). I offered to do more investigation, no response
3) It's open source, I really don't owe anyone anything, nor they me