WTH can't I see a device name or id under config/entities?

[alikasundara]

It would be great if I could get a list of entities for a device easier than by evaluating a template expression under dev tools
{{ device_entities(device_id('climate.trv_bedroom_upstairs')) }}

[Ildar_Gabdullin]

You can see entities belonging to a device here:

Or here:

You can see a device of an entity here:

No need to use templates just to see a list of entity_ids.