[Avamander]

Primarily because OP can't verify that the patch is truly correct. There's also the fact that anything LLM-generated will likely be frowned upon (for the same reason).

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.