Text Bold
Text Italic
Text Underscore
Text Strikeout
Text Subscript
Text Supscript
I can't find any evidence there ever was a superscript tag.
Its an option in the full-editing menu bar, suggesting its a by default supported tag.(never-mind)
Text
Supscript
fixed, the tag was set to use super
instead of sup
Use tag as normal now
superscript