---
- name: Perform ReaR backup before the /boot expansion
  hosts: all
  become: true
  gather_facts: true
  strategy: free

  tasks:
    - name: Perform a ReaR backup if any disk modifications are to be made
      ansible.builtin.import_playbook: rhc.rear.rear_backup
      when:
        - bigboot_execute_bigboot | bool
        - not bigboot_skip_rear_backup | bool

...