This is going to happen as some point that someone asks ChatGPT to make a sample question for a proposal (I tried for Model Rocketry, it gave a reasable question). Should this be allowed?
No. Stack Exchange is for solving real problems and answering real questions that people have. If a question was generated by an AI, that means that it's not actually a real question/problem that a person is having.
If you're having to generate questions for the sake of generating questions, the proposal probably isn't worth it.