There should be no problem with linking the defaultCommentOptions on JavaScript, it would be on this part of your code on the HTML:

    ...
    let othersChatDiv = document.createElement('div');
    othersChatDiv.id = 'others-chat-container';
    othersChatDiv.style.display = 'none'; // Hide others chat by default
    
    let mainChatOptions = defaultCommentOptions.createClone;
    mainChatOptions.channel = "qine-main-chat";
    mainChatOptions.commentPlaceholderText = "Casual talk, memes, fun — all here!";
    mainChatOptions.onComment = function (comment) {
      // Handle new comments in Main Chat
      console.log("New comment in Main Chat:", comment);
    }
    let mainChatPlugin = commentsPlugin(mainChatOptions);
    ...

The problem is bannedUsersList is not in the generator, so it gives errors. Removing that from the defaultCommentOptions makes it work.