New install 4 days ago moderator posts are being held for approval. The moderator user group setting are set to allow the group to bypass approval and the user account field for wpforo are set to moderator
Please not, the setting to bypass approval for usergroup is not enough. wpForo also has a Spam Control in Dashboard > Forums > Tools > Antispam admin page. It has "New Registered Users" controlling options. If the content of new registered user is suspected, it'll be set unapproved until the new user rich the minimum number of posts to be out of "new user" status. You can set the pot number 0 if you don't control new registered users.
Also please note, if the second or third post is suspected and set unapproved, all other topics and posts of this user becomes unapproved, it doesn't matter you've approved it before or not. This is only happens for users with "New registered" status explained above.