Azure Resources API doesn't give me all fields - azure

Question

I can't make the Azure Resources API return the full list of fields as it promises to do. The address of the API:
https://learn.microsoft.com/en-us/rest/api/resources/resources/list
I'm calling:
https://management.azure.com/subscriptions/00000000-0000-0000-0000-000000000000/resources?api-version=2019-10-01&%24filter=resourceType%20eq%20'Microsoft.Compute%2FvirtualMachines'
which gives me the list in a form:
{
"value": [
{
"type": "Microsoft.Compute/virtualMachines",
"id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/xxx-x-xxx-xxxxxxx/providers/Microsoft.Compute/virtualMachines/xxx-x-xxx-xxxxx",
"name": "xxx-x-xxx-xxxxx",
"location": "xxxxxxx",
"zones": [
"1"
],
"plan": {
"name": "xxxxxxx",
"product": "xxxxxxx",
"publisher": "xxxxxxx"
},
"tags": {
"MYID": "xxxxxxx"
}
}
What I miss is information about e.g. VM size (inside SKU).
I tried adding $expand parameter, but it only works for parameters which have
This is only present if requested via the $expand query parameter.
in their description. Examples are: createdTime and changedTime.
I understand that the rest of the parameters should always be returned. But they are not.
Does anyone know what I'm doing wrong?

Answer 1

I believe by default the REST API specification / schema of Resources - List doesn't capture VMsize / SKU. You may leverage Virtual Machines - List All which provides VMsize / SKU in the output format like shown below.
{
"name": "xxxxxxxxxxxx",
"id": "/subscriptions/xxxxxxxxxxxxxxxxxxxxxxxxx/resourceGroups/xxxxxxxxxxxxxxxxxxx/providers/Microsoft.Compute/virtualMachines/xxxxxxxxxxxx",
"type": "Microsoft.Compute/virtualMachines",
"location": "xxxxxxxxxxxx",
"tags": {
"xxxxxxxxxxxx": "xxxxxxxxxxxx",
},
"properties": {
"vmId": "xxxxxxxxxxxxxxxxxxxxxxxxx",
"hardwareProfile": {
"vmSize": "xxxxxxxxxxxx"
},
...
...
...
}
}