There have been a long list of comments on one of my questions I asked. However, 3 months later, the comments have been moved to chat, and the comments are currently locked for 10 years. What exactly in going on with the string of comments? The same think happened with a question I asked in 2020.
I moved them to chat because we don't want to encourage commenting. There were too many comments there. And I locked it against further comments for the next decade so that it doesn't get any more added to it, either.
Nothing is gone. And comments are not precious. They are subject to complete deletion at any point. Those are saved, but in chat where they belong, not dirtying up the question with conversation threads, which goes against the SE model.
If comments are important, edit your post and put their content there where they belong. Chat is for chattiness, not Q&A.