Yes, you may change the visibility of your offering, even after publication.

For example:
Suppose that you have chosen to open your offering only to some of your partners, and you then choose to expand its visibility to include all platform members. You will need to determine whether or not your licenses apply to all members, or only to certain profiles (for example, to create a license reserved for your partners with preferential conditions, and a different license for other platform members).
How do I change my offering’s visibility?
- Go to the "Publication" menu.
- Click on “Edit” once you've found the desired offering.
- Go to the "Visibility" step
- Change visibility settings