I have stumbled upon an interesting request for the ability to add subscript and superscript inside a rich text editor.
After doing some research, I've found similar requests, but they've unfortunately led me to nothing.
To summarize my investigation process, I've visited this link:
This led me here(migrated article) :
And finally, I ended up back at Prismic documentation where there is no mention of subscript and superscript.
The project is currently using Gatsby.js and I'll be available to answer questions or follow up on this issue frequently. I look forward to hearing from anyone who can help!