As a Regular, you can now create posts and replies in all categories without post approval, as you have shown that you know how to make these topics according to forum rules and guidelines.
You can level up to Top Contributor by being active and making frequent, positive contributions to discussions. This level is meant for the best contributors in our community, to acknowledge and reward their dedication to high-quality discussion.
Note: Promotions from Regular --> Top Contributor are on hold until the criteria are updated not to require manual checks from the community.
Additionally, it is possible to be invited to level up directly to Community Editor . The criteria for this are (roughly) that you show exceptional knowledge of forum rules and guidelines, and have consistently high quality posts over the time span that you have been a Regular.
I don’t see anything about Regulars needed Post Approval.