How to share and globally update Rise "template"

We have a specific color theme and custom font family to use for Regular, Bold and Italic for our Rise courses. We all work on individual cloud licenses of Rise 360.

Currently, a course is created with our defined color theme, font, cover picture, logo, etc, and we duplicate that course, rename it and use it to develop.

Is there a way to update the course used as the "template", and have those changes automatically apply to all courses using that "template"?

Would the "transfer ownership" or making all of us "co-owners" or "managers" make this doable?