This assumes you are already familiar with logging in and logging out of OpenShift using Ansible. If not, check out my article FreeKB - OpenShift - Log into OpenShift using Ansible community.okd.openshift_auth.

Here is an example of how to return a list of all namespace using Ansible kubernetes.core.k8s_info.

---
- hosts: localhost
  module_defaults:
    group/community.okd.okd:
      host: https://api.op.example.com:6443
      validate_certs: False
  tasks:
  - block:
    - name: login
      community.okd.openshift_auth:
        username: john.doe
        password: itsasecret
      register: openshift_auth_results

    - name: get all namespaces
      kubernetes.core.k8s_info:
        api_key: "{{ openshift_auth_results.openshift_auth.api_key }}"
        kind: Namespace
      register: all_namespaces

    - ansible.builtin.debug:
        var: all_namespaces

    always:
    - name: logout
      community.okd.openshift_auth:
        state: absent
        api_key: "{{ openshift_auth_results.openshift_auth.api_key }}"
...

name can be used to return the details of a specific namespace.

- name: get all namespaces
  kubernetes.core.k8s_info:
    api_key: "{{ openshift_auth_results.openshift_auth.api_key }}"
    kind: Namespace
    name: my-namespace
  register: my_namespace