Loading Skills via CSV is not currently available.  However, it is currently under a Feasibility Assessment with the Product Team.  You can follow the Skills Feature enhancements on the Docebo Feature Roadmap.

The only way to upload skills is to go into the API. Although if you upload your own skills and unpublish “All skills” if you’re adding skills to a course or an asset as a super admin it will still show up. So you need to have a list of the skills you want to add. Also if you enable the AI skills adder, it will take skills from unpublished lists. The skills functionality is completely rubbish. So much so that I’m developing my own skills logger outside of the platform.