I think the more important question is: do you allow ChatGPT use on the job? If so why would it be disallowed during the interview?
With the way interviews are currently conducted, many (like me who get debilitating panic attacks and anxiety during interviews) can't showcase their problem solving and coding skills - because more than their software skills, these interviews/interviewers seem to be assessing anxiety!
With a few minutes alone time to gather and organize thoughts, run through an LLM, come up with effective communication and have a back-and-forth friendly discussion - like how it is with colleagues. No one would want to work in an environment where everyday is like getting through stressful situations - needlessly I should say.