It is possible, but due the reason that you got yours it won't be easy at all as you would have to prove that you changed and that you are not chatbot shitposter anymore and that takes time and effort on your side.

Ignorance is not a valid excuse and you should feel lucky that you only ended up with neutral tag as plagiarism (and use of Chatgpt isn't plagiarism indeed) is usually punished by forum ban.