Use case or problem
Obsidian currently can render superscript and subscript using HTML tag <sup> and <sub>, or mathjax $^{ }$ and $_{ }$. However, the HTML tag does not recognized by pandoc by default without a filter, and using mathjax for units like $m^2$ is fine but can be really painful for long sentences.
Proposed solution
Allow the render of the pandoc style super- and subscripts such as m^2^ and CO~2~
Current workaround (optional)
Current workaround is simply ignore the fact that ^^ and ~~ are not rendered in Obsidian, and send the markdown as it is to Pandoc.