Publish the design system

I have created a design system for a mobile app in a Figma file (lets call it A). Also, my project files are also in the same Figma files but in different pages.. Now the problem is, my Figma file is getting heavier and sometimes, it takes too much time to load. I tried publishing the design system (lets call it B), but every time I call a component, it directs me to the main components in the design system  A. Where am I doing wrong? and what is the solution to publish the design system so that my current components sync with it (B), and not with the A.