For issues 1, and 2, the solution is as follow:
in the terminal, add the rehype package typing
yarn add rehype-raw
Inside your Article/index.js import rehype:
import rehypeRaw from "rehype-raw"
Inside your function add it to Markdown like this:
<ReactMarkdown
children={articles.data[0].attributes.content}
rehypePlugins={[rehypeRaw]}
/>