How could render headings of markdown as it does in org-mode:
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https://preview.redd.it/dh7o5ys5q2w91.png?width=317&format=png&auto=webp&s=ad979a1f17e6481879efec0636a517a57d4975e8
It's default "markdown-toggle-markup-hiding" function very trivially.
https://preview.redd.it/j2v0g5smq2w91.png?width=233&format=png&auto=webp&s=6dfd1296fb2f6bf940e1c07ca8fb10761430c4bc