Can I create a Q&A forum where only the admin add topics?
Can I create a Q&A forum where only the admin add topics, and users only can answer and comment there (user can't create a topic)?
yes, it's possible, you just need to uncheck the "Can create topic" permission and make sure the "Can post reply" permission is checked.
Please read this post, you'll get useful information for wpForo Usergroups, Forum Accesses, etc...
In case you want to say thank you !)
We'd really appreciate and be thankful if you leave a good review on plugin page. This is the best way to say thank you to this project and support team.