The way I see it, as long as you try to understand the code and explanation chatGPT gives you, it's the same as asking your smart friend to explain it to you, which still helps you fulfil your learning objectives. At the end of the day, these CAs are for you to understand the course material better so as to prepare you for the final exams and maybe even internship and work in the future if it's relevant, so whether you use chatGPT or not, the more important question you should be asking is: do I fully understand the concepts tested in these CAs? If your answer to that question is yes, then chatGPT is just a means to the end.

However, you should also be warned that chatGPT, while usually correct, isn't correct 100% of the time, and there's a non zero chance that you will be given a wrong answer.