interface:config is not required if enable: False

wireguard/init.sls

 {%- for interface in salt['pillar.get']('wireguard', {}).keys() %}
+
+{% if salt['pillar.get']('wireguard:' ~ interface ~ ':enable', True) %}
 wireguard_interface_{{interface}}:
   file.managed:
     - name: /etc/wireguard/{{interface}}.conf
     - contents_pillar: wireguard:{{interface}}:config
     - mode: 640
 
-{% if salt['pillar.get']('wireguard:' ~ interface ~ ':enable', True) %}
 restart wg-quick@{{interface}}:
   service.running:
     - name: wg-quick@{{interface}}
     - name: wg-quick@{{interface}}
     - enable: False
 {% endif %}
+
 {%- endfor %}