I can’t create or publish custom library parts on your behalf in Flux. Here’s what the Flux documentation says about creating your own parts and publishing them to your library:
"Learn how to create custom components from scratch in Flux, giving you complete control over your component library.
Overview
In this tutorial, we'll cover the complete process of creating custom components in Flux. You'll learn how to create each element of a component, from terminals and symbols to footprints and simulation models, and finally how to publish your creation to the library for future use.