Ansible filtering facts with templates instead of json_query filter

fact_template.j2

{% set results = {} %}
{% for fact in ansible_facts %}
  {% if ansible_facts[fact] is mapping and 'pciid' in ansible_facts[fact] %}
    {% set x=results.__setitem__(ansible_facts[fact]['pciid'], ansible_facts[fact]['device']) %}
  {% endif %}
{% endfor %}
{{ results|to_json}}

test.yaml

---
- name: test
  hosts: localhost
  vars:
    test_var: "{{ ansible_facts | dict2items | json_query('[?value.pciid].value.{key: pciid, value: device}') | items2dict}}"
  tasks:
    - set_fact:
        test_var2: '{{ lookup("template", "fact_template.j2") | from_json }}'
    - name: debug output
      debug:
        var: test_var
    - name: debug output
      debug:
        var: test_var2