immersive-home/lib/home_apis/hass_ws/templates/devices.j2

{% set devices = states | map(attribute='entity_id') | map('device_id') | unique | reject('eq',None) | list %}
    
{%- set ns = namespace(devices = []) %}
{%- for device in devices %}
  {%- set entities = device_entities(device) | list %}
  {%- if entities %}
    {%- set ns.devices = ns.devices +  [ {device: {"name": device_attr(device, "name"), "entities": entities }} ] %}
  {%- endif %}
{%- endfor %}
{{ ns.devices }}