{% set copy_=unifi_gateway_config -%}
{% for inf in unifi_gateway_config.interfaces.wireguard %}
    {%- set p=[] -%}
    {% for peer in unifi_gateway_config.interfaces.wireguard[inf].peer %}
        {%- set m=peer.key -%}
        {%- set x=peer.pop("key") -%}
        {%- set x=(p.append({m: peer})) -%}
    {% endfor %}
    {%- set x=(unifi_gateway_config.interfaces.wireguard[inf].__setitem__("peer", p)) -%}
{% endfor %}
{{- copy_ | to_json(indent=4) }}