You can add to a discussion by replying to a post on Threads. When you reply to a post, your reply will appear as its own thread in the replies tab on your profile and people will be able to reply to it.
Reply to a post
Keep in mind
- If someone replies to you and you delete your post, their reply won’t be deleted.
- If you and the author of the post have both turned on sharing to the fediverse, a message will appear at the top, as you’re drafting your reply, to indicate that your reply to the post will be shared with users on other servers.
- Your replies won’t appear on other fediverse servers if the format of the post you’re replying to isn’t supported or the post limits who can reply to it.