All users have Edit, Delete and Reply buttons. But these buttons don't exist if the new topic/post status is unapproved. Also, the Edit and Delete buttons are time limited. You can manage the time limit or remove it all in Dashboard > Forums > Settings > Topics & Posts Tab.

https://wpforo.com/wp-content/uploads/2021/01/wpForo-manage-time-limit-for-edit-delete-own-topic-post.png

Another important part is the permissions of users. If these permissions are disabled for users Forum Access (usually the "Standard Access") in Dashboard > Forums > Settings > Forum Accesses admin page then they'll not be able to Edit, Delete or Reply:

• Can post reply
• Can reply to own topic
• Can edit own topic
• Can edit own reply
• Can delete own topic
• Can delete own reply

https://wpforo.com/wp-content/uploads/2021/01/wpForo-allow-users-to-edit-delete-reply.png

BTW, all these are enabled by default, so forum admins don't have to do this, unless you've made some changes in Usergroup <> Forum Access settings and changed the Standard Access for your default Usergroup.

A good topic to understand how forum Usergroup and Forum Accesses work: https://wpforo.com/community/faq/wordpress-user-roles-wpforo-usergroups-and-forum-accesses/

Thanks!