TOLORS wrote:

4.1 Disable “See Inside” or restrict sharing
Some users want an option to prevent Scratchers from looking inside their project and using their artwork, scripts, or sounds. However, the core ideas of Scratch are "Imagine, Program, Share.“ By sharing a project on the Scratch website, you are allowing others to see the code and potentially remix or reuse the data inside, as long as they give credit. That being said, please use the Report button on any project that uses content from another Scratcher without giving credit to them. If you do not want other users to see inside your project, then do not share your project on the Scratch website.