Except in Math objects, Nebo isn't a fan of superscripts. This means Nebo doesn't support small upper characters in sentences.
You can still write ordinal numbers like dates (November 26th, January 3rd, etc) but the letters will be in the regular size, like here.
Superscripts for abbreviations aren't supported either, but abbreviations with regular sized characters can be converted. Visit our article to know more about it.