Keyword and Map are Enumerable in the sense that you can sensibly go through each entry one at a time. However they are also key value data structures. There will be a variety of same name functions related to the fact that they are both key value data structures that have nothing to do with iterating through collections.

Enum does not exist as a one stop shop of “every function that applies to multiple data structures”. It is specifically about manipulating Enumerable structures in their capacity of being enumerable.

Most of the contributions I’ve made to the Elixir core code have been contributions to the docs so once you get an answer, I encourage you to fork the Elixir core code and add what you need.

You may want to have a look at this project of mine
https://github.com/eksperimental/elixir_inconsistencies

It may be useful for what you are working on