https://stackoverflow.com/questions/79661298/is-it-truely-read-extra-vars-on-ansible-playbook-commands

gistfile1.txt

$ pwd
/tmp/so_reproduce

$ cat playbook.yml 
---
- hosts: localhost
  gather_facts: false

  tasks:
    - name: Debug our external var
      ansible.builtin.debug:
        var: cml_lab_file

$ ansible-playbook playbook.yml -e cml_lab_file="{{ lookup('env', 'PWD') }}/../toto/pipo.yml"

PLAY [localhost] *******************************************************************************************************************************************************************************************

TASK [Debug our external var] ******************************************************************************************************************************************************************************
ok: [localhost] => {
    "cml_lab_file": "/tmp/so_reproduce/../toto/pipo.yml"
}

PLAY RECAP *************************************************************************************************************************************************************************************************
localhost                  : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0