Design system library across organizations

I work for a company that manages the design system for all public administration projects. The goal is to provide all consulting companies with a constantly updated design system library.
However, I have discovered that outside the organisation, it is not possible to connect the library to the work files.
I cannot allow the files to be copied because they would lose the updates and we would lose ownership of the files. How can we proceed? Any advice?
I was thinking about projects connected between organisations, but there is a maximum of 15 per enterprise.