Request for explanations

Thank you first of all for this very useful plugin. I'm trying to understand how it works (but I don't have a great knowledge of web tools and languages, nor of markdown in its different versions ;-)
After some time of use, I have a lot of questions. I thank you in advance for the time you will take to answer them.
1. There are a whole bunch of extensions for Markdown-it. Is it possible to add them to your plugin? (for example, for the superscript: "^2" instead of "²").
2. Plantuml allows you to create a wide variety of diagrams, not only UML (for example, maths with @startmath or ditaa graphics with @startditaa): These graphics are generated on the www.plantum.com server, like those generated by @startuml. Can "Markdown Preview for (Neo)vim" take them into account?
3. I discovered a very interesting tool for data modeling, under Python, which generates markdown for relationships and svg for diagrams. It is called mocodo: (https://github.com/laowantong/mocodo http://mocodo.wingi.net). Is it possible to integrate the use of this tool in your plugin?

Thank you very much.