Blending AI Site Builder with Custom Webflow Sections

I am new to the platform. I am using the AI Site Builder (which is awesome by the way), and want to use some of the sections available in it, but I also want to create my own custom sections in Weblow (using Relume components and some of my own). How do I blend these two approaches because won't Site Builder just over-write my custom sections in Webflow when I sync it?