TL;DR: while you can’t easily apply the markup that generates subscripts and superscripts, you can easily get the unicode character for a given, common, superscript or subscript and use that. It’s displaying fine in my existing webflow project.
Anyway, figured I would share the wealth, since I didn’t find any results that didn’t involve a lot of styles futzing.
Many of the latin letters are also available in the source link, though not every single one (scroll down to latin and greek tables in the wikipedia article and copy/paste from there)