Getting an empty array in response for List place API

Question

I have created multiple room resources on Exchange Admin Centre To retrieve all the created rooms in a tenant, I've attempted to use the List Places API.

GET https://graph.microsoft.com/v1.0/places/microsoft.graph.room

Response:

{
    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#places/microsoft.graph.room",
    "value": []
}

Why does this API return an empty array even though rooms are already present?