The word "on" fits better meaning "on the subject of question 1". The word "in" fits better meaning "occurring in question 1", or in its answer, if that is what is meant. The comments would be understood with either "on" or "in", though. Since you've invited rewording, these might work: For question 1, you repeated the example as a sentence.
I might have a question: Would you be willing to answer a question? I wonder if you might possibly be willing to consider a question? And so on. Some might consider "I had a question:" a gentler and more polite expression than "I have a question:" because it implies that the question hasn't been constantly on your mind; it arose once and is ...
At some point during a long-term relationship, many couples begin to question whether life-long monogamy is genuinely a good fit. Partners may feel a strong emotional connection to their partner but ...
prepositions - on question 1 or in question 1 - English Language ...
I have a question on the grade you awarded me. I have a question on metaphysics. I'm having real trouble figuring out why on doesn't work in your example sentence. D (related) has a wider meaning: it indicates questions that have something to do with the course. In particular, related includes questions about the subject matter of the course.
Asking a question: DO or ARE? - English Language Learners Stack Exchange
tense - "I had a question" or "I have a question" - English Language ...
When do I use is or does when I ask a question? For example, Is your item still for sale? Does your item still for sale? I am not sure which one to use.