TypeScript refactorings vs C# refactorings

Hello,

Why is the set of refactorings for TypeScript substantially smaller
than what's available for C#? I would have expected to be roughly the
same.

Why, they have not been written yet. It's another language, a non-CLR language
even, so much customization is required for each of the refactorings to be
shipped for TypeScript.
If something else doesn't kill TypeScript (like, WebAssembly or something),
then over time its set of refactorings will get rich enough.

—
Serge Baltic
JetBrains, Inc — http://www.jetbrains.com
“Develop with pleasure!”