[rendall]

That's a category error. Fetch is just refers to making a request. POST is the method or the HTTP verb used when making the request. If you're really keen, you could roll your own

  const post = (url) => fetch(url, {method:"POST"})

[catlifeonmars]

I read this as OP commenting on the double meaning of the category. In English, “fetch” is a synonym of “GET”, so it’s silly that “fetch” as a category is independent of the HTTP method

[rendall]

That makes sense.