The following is an excerpt from
https://reason.com/volokh/2022/12/28/plagiarism-and-chatgpt
It talks about exams. Other profs talk about its use with homework.
ChatGBT answers are not identical to other things posted on the Internet. Normal plagiarism detection will not work.
If you haven't tried it yourself, it's worth a try. Be aware that after the initial answer, you can criticize it, or give more detailed requirements and it will produce improved answers.
@Greg Bernhardt even tried feeding it some broken HTML code, and the AI found the bugs and gave back improved correct code.
https://chat.openai.com/chat
You'll have to create a free account.
Is this something to worry about? What is the defense?