API to get list of paces id (all shops) in a shopping mall

Question

I need to get the list of shops(place ids) in a shopping mall. I am trying to use the api,

https://places.googleapis.com/v1/places:searchText

with payload,

    {
      "textQuery": "Westfield Sydney, 188 Pitt St, Sydney NSW 2000",
      "pageSize": 10
    }

Field Mask : places.id,places.displayName,places.formattedAddress,nextPageToken

The response is returing place details with only the shopping mall and not all the shops, eventhoug all shops having the textQuery text in their formattedAddress.

    {
      "places": [
        {
          "id": "ChIJwWBUqD-uEmsRl9SNDJ2L86M",
          "formattedAddress": "Cnr Pitt St Mall and, Market St, Sydney NSW 2000, Australia",
          "displayName": {
            "text": "Westfield Sydney",
            "languageCode": "en"
          }
        }
      ],
      "nextPageToken": "AUc7tXVeeqRcXzB8O_AUjzpcKCSNxkhoV5QP5LXYKpT7-pxd4F32PNclv972tgUbVz2ILaWhm59CR8q9dNjWq0PikcQFjFgLenj-4VNX4wwS0kJJ"
    }

Please let me know is there any other API I need to use to get the list of places ids of the shops in a shopping mall. Thanks

Expected Result,

    {
      "places": [
        {
          "id": "ChIJwWBUqD-uEmsRl9SNDJ2L86M",
          "formattedAddress": "Cnr Pitt St Mall and, Market St, Sydney NSW 2000, Australia",
          "displayName": {
            "text": "Westfield Sydney",
            "languageCode": "en"
          }
        },
        {
          "id": "ChIJrT6HsT-uEmsRrG0FjdLcygE",
          "formattedAddress": "Westfield Sydney, Shop 3012 - 4004/188 Pitt St, Sydney NSW 2000, Australia",
          "displayName": {
            "text": "Gucci - Sydney Flagship, Westfield",
            "languageCode": "en"
          }
        },
        {
          "id": "ChIJXYArsj-uEmsR9CdQCmKG3J8",
          "formattedAddress": "Level 1, Shop 1024 Westfield Sydney, Pitt St, Sydney NSW 2000, Australia",
          "displayName": {
            "text": "Nike Sydney Pitt Street",
            "languageCode": "en"
          }
        }...
      ],
      "nextPageToken": "AUc7tXVeeqRcXzB8O_AUjzpcKCSNxkhoV5QP5LXYKpT7-pxd4F32PNclv972tgUbVz2ILaWhm59CR8q9dNjWq0PikcQFjFgLenj-4VNX4wwS0kJJ"
    }