To automatically add the first comment to your LinkedIn post, follow these steps:
Click on Schedule or Publish: Begin by clicking on Schedule or Publish button. As soon as you do this, a modal window will appear.
Locate the Auto-Plug (comment) toggle: In the modal window, look for the option labeled "Add Auto-Plug."
Enable the Auto-Comment: Toggle this feature on to enable automatic commenting.
Enter Your Comment: Type in the comment you wish to post automatically.
Set the Comment Timing: Choose when you want the comment to be published relative to the post's publication time.