If you are talking about using tabs in Markdown, then you can already use markdown syntax, just be aware of certain quirks: https://docusaurus.io/docs/next/markdown-features/react#markdown-and-jsx-interoperability

In short, remember to add extra empty lines between the JSX tags and your Markdown.

If you want tabs in JSX to parse the Markdown content, then sorry, we never parse markdown on the client-side and you need to implement that yourself by swizzling Tabs.