Welcome to the Make community!
The equals operator is case-sensitive.
You can try using the replace function with a pattern instead.
{{replace(1.sex; "/^(Non-Binary, Gender Fluid, Gender non-conforming, or Gender queer)$/i"; "Non-Binary")}}
Make Input Markup:
Copy-paste the above into the field, including start/end curly brackets for it to import as intended
This replaces an exact match, but not case-sensitive.
Hope this helps! If you are still having trouble, please provide more details.
— @samliew
P.S.: investing some effort into the tutorials in the Make Academy will save you lots of time and frustration using Make!