Documentation for @callback?

Hello! I am wondering if there is somewhere a “documentation cheetsheet”? I am looking at Writing documentation — Elixir v1.20.2 but I do not see a list of all available documentation attributes. I only see this sentence “such as @moduledoc, @typedoc, and @doc” but I am not knowing which options I can use or if other attributes are existing or which options they accept.

What should I use to documentation of @callback?

I am not seeing documentation for a function that implements callback. For exmaple:

defmodule Y do
  @doc """
  My documentation here
  """
  @callback something() :: keyword()
end


defmodule X do
  @behaviour Y

  @impl true
  def something() do
    [a: "apple"]
  end
end

However, my X module shows no functions in its documentation. This is not what I expect. ex_doc 0.24.2.

Thank you!