Ansible - Combine Nested Array from variable

Question

I need some advice/help for a problem that i can't manage to solve at this time :(

This is my first post on this site so dont be that bad with me if i'm on the wrong section.

Here the problem :

1. First i call the vmware api to retrieve vmware cluster id (OK for this)
2. From the array of clusters id i manage to call the api to retrieve all hosts from these
3. Creating my array of hosts created multiple array into my var like this :

Here the task Ansible that create these array in my var

- name: Virt-Who Reconfigure - Set Fact Hosts for Cluster "{{ cluster_redhat_regex }}" and "{{ cluster_poc_regex }}"
  set_fact: vmware_cluster_redhat_poc_tmp={{ vmware_cluster_redhat_poc_hosts.results | json_query('[*].json.value[*].name') }}
  when: manage_org_covea == True

Example of the output of the task (hiden info for security)

{
    "changed": false,
    "ansible_facts": {
        "my_vars": [
            [
                "host-xxx.local.domain",
            ],
            [
                "host-xxx.local.domain",
            ],
            [
                "host-xxx.local.domain",
            ],
            [
                "host-xxx.local.domain,
            ],
            [
                "host-xxx.local.domain,
            ],
            [
                "host-xxx.local.domain",
            ],
            [
                "host-xxx.local.domain",
                "host-xxx.local.domain"
            ],
            [
                "host-xxx.local.domain",
                "host-xxx.local.domain"
            ]
        ]
    },
    "_ansible_no_log": false
}

I'm trying to combine all these "nested array" from the var into a single array but i'm stuck !

The expected result is something like this bellow :

{
    "changed": false,
    "ansible_facts": {
        "my_vars": [
            [
                "host-xxx.local.domain",
                "host-xxx.local.domain",
                "host-xxx.local.domain",
                "host-xxx.local.domain,
                "host-xxx.local.domain,
                "host-xxx.local.domain",
                "host-xxx.local.domain",
                "host-xxx.local.domain"
                "host-xxx.local.domain",
                "host-xxx.local.domain"
            ]
        ]
    },
    "_ansible_no_log": false
}