When right clicking on an incorrectly spelled word, no options or suggestions are provided for the incorrectly spelled word, except learn. Many of the incorrect spellings that I enter are simple fat finger errors or transposed characters that are easily caught is word and email spell checkers.
I am not sure what Codex uses for a dictionary or what logic is uses to underline incorrect words, but it seems that this should be easy to implement since spell checkers have been around for decades.
You are welcome to discuss Codex issues on the forum, however the official place to report and track them is the GitHub issue tracker for OpenAI Codex.
I had ChatGPT search for your issue, it did not find an exact match but did find similar, e.g.
Try searching the existing GitHub issues for a closer match. If you cannot find one, then open a new issue with as much detail as possible.
Consider adding a reaction on the GitHub issue you find of value, as reactions on GitHub help the developers gauge impact and prioritize work.