Step functions Filter support for jsonpath - feature request

AWS Step function's Jsonpath implementation has some known limitations compared to the original jsonpath implementation:

Reference Paths

A reference path is a path whose syntax is limited in such a way that it can identify only a single node in a JSON structure:

You can access object fields using only dot (.) and square bracket ([ ]) notation.

The operators @ .. , : ? * aren't supported.

Functions such as length() aren't supported.

I'd like request to implement these unsupported features.

Sample use-case:

Cognito User Pools: AdminGetUser step-function action returns UserAttrubutes in an array of json nodes:

"UserAttributes": [
    {
      "Name": "sub",
      "Value": "f3cab39d-bfe5-4b1a-a8fc-e1a97ec0d18b"
    },
    {
      "Name": "email_verified",
      "Value": "true"
    },
    {
      "Name": "custom:name",
      "Value": "My Name"
    }
    {
      "Name": "email",
      "Value": "myname@mycompany.com"
    }
  ]

Jsonpath filters would provide a very simple way of extracting data from this payload based on "Name" field of the nodes. For example getting the email for a user: $.UserAttributes[?(@.Name=='email')].Value

Without this feature I needed to implement a lambda for this purpose, because I can't rely on the order of the response array.