I found a chatbot helpful when I explicitly requested it, in detail, to argue the other person's side with me. I basically approached it as "I want advice on this particular conflict," I explained who the other party was, I explained my best summary of the situation as a whole, and I went back and forth.

I found it cathartic because I could basically argue with that person about it, without asking that person to do emotional labor or be subjected to my criticisms of where I felt they were wrong. Ultimately I landed on several points I did eventually go to that person with, I dropped several others that the chatbot pointed out weren't really something it was fair to criticize them for, and I think our friendship is overall better for it.

I don't think there was anything revolutionary there, it's basically journaling with an LLM, but it was more efficient if nothing else.

Edit: I would also caveat that I've attended a lot of therapy, individual and couples, so numerous concepts that some people may not know, things like emotional labor, boundaries, healthy communication, etc. are already very familiar concepts to me. So, I wouldn't recommend a chatbot as a FIRST stop? But if you've attended a lot of therapy and already know a fair bit about how your own feelings work, I think it can help, as long as you explicitly request that it doesn't just glaze you continuously.