Set mount option for given mount point with ansible

I managed to get what I want with the json_query filter:

- name: "mount options for /"
  mount:
    path: "/"
    src: "UUID={{ ansible_mounts | json_query('[?mount == `/`] | [0].uuid') }}"
    fstype: "ext4"
    opts: "errors=remount-ro,noatime,user_xattr,acl"
    state: "present"

You will need to install the package python-jmespath.