Hi there, yes there are a number of ways to get at the html/css.
The simplest way is to use the rest API to fetch the fully bundled html/css.
If you want a point and click approach, you can push a next JS project to GitHub pages, and browse the fully built files in the GH pages branch.
A more advanced thing you can do is to use codegen, for the raw react modules.
Please let me know if that helps.