There is a field where I can enter forum rules for users, but I can't find where users can see these rules. I need support on this
Your users can see the forum rules on the registration page under the sentence I agree with the forum rules.
The Forum Rules and Terms can be opened on the registration page. Here is the doc: https://wpforo.com/docs/root/gdpr/right-to-be-informed/#forum-rules
The contents are also accessible through links:
IMPORTANT: You should enable checkboxes in wpForo > Settings > Privacy & Forum Rules admin pages to see the content with the links mentioned above:
The documentation: https://wpforo.com/docs/root/gdpr/right-to-be-informed/