Guiding article for dashboards here: https://www.wesleyhaakman.org/azure-lighthouse-resource-graph-dashboards/
Make sure the Az.ResourceGraph module is installed (Install-Module -Name Az.ResourceGraph) Login using "Login-AzAccount" and simply copy/paste the query.
If you prefer to query a single subscription, al you need to do so add the "-subscription" parameter to the Search-AzGraph command like Search-AzGraph -subscription "" -Query "distinct(tenantId), subscriptionId"
Get delegated Tenants + Subscriptions
Search-AzGraph -Query "distinct(tenantId), subscriptionId"
Top 10 resource by type
Search-AzGraph -Query "summarize count() by type 
| project type, total=count_ 
| top 10  by type 
| order by total desc"
Resources by location
Search-AzGraph -Query "summarize count() by location 
| project location, total=count_ 
| order by total desc"
Check for HTTPS Only on App Services
Search-AzGraph -Query "extend httpsOnly = aliases['Microsoft.Web/sites/httpsOnly'] 
| where type =~'Microsoft.Web/Sites' and httpsOnly =~ 'false' 
| project AppService=['name'], Kind=['kind'], Subscription=['subscriptionId']"
Stopped App Services
Search-AzGraph -Query "extend state = aliases['Microsoft.Web/sites/state'] 
| where type=~'Microsoft.Web/Sites' and state =~ 'stopped' 
| project AppService=['name'], Kind=['kind'], State=['state'], Subscription=['subscriptionId']"
App Service Plans count by SKU
Search-AzGraph -Query "extend sku = aliases['Microsoft.Web/serverfarms/sku.name'] 
| where type=~'Microsoft.Web/serverfarms' 
| summarize count() by tostring(sku) 
| project sku, total=count_"
App Service Plans Basic Information
Search-AzGraph -Query "extend sku = aliases['Microsoft.Web/serverfarms/sku.name'] 
| extend NumberOfApps = aliases['Microsoft.Web/serverFarms/numberOfSites'] 
| where type=~'Microsoft.Web/serverfarms' 
| project Name=['name'], sku, NumberOfApps, Location=['location']"
App Service plans count by Web Apps
Search-AzGraph -Query "extend NumberOfApps = aliases['Microsoft.Web/serverFarms/numberOfSites'] 
| where type=~'Microsoft.Web/serverfarms'
| project Name=['name'], NumberOfApps, Location=['location']"
VMs overview
Search-AzGraph -Query "extend OS = aliases['Microsoft.Compute/virtualMachines/storageProfile.osDisk.osType'] 
| extend 
SKU = aliases['Microsoft.Compute/virtualMachines/sku.name'],
OSSpecific = aliases['Microsoft.Compute/virtualMachines/storageProfile.imageReference.offer'],
Version = aliases['Microsoft.Compute/virtualMachines/storageProfile.imageReference.sku'] 
| where type =~ 'Microsoft.Compute/VirtualMachines' 
| project name, OS, OSSpecific, Version, SKU, Location=['location'], Subscription=['subscriptionId']" |ft
VMs count by operating system
Search-AzGraph -Query "extend Os = aliases['Microsoft.Compute/virtualMachines/storageProfile.osDisk.osType'] 
| where type =~ 'Microsoft.Compute/virtualmachines' 
| summarize count() by tostring(Os) 
| project Os, total=count_"
VMs count by image offer
Search-AzGraph -Query "extend OsOffer = aliases['Microsoft.Compute/virtualMachines/storageProfile.imageReference.offer'] 
| where type =~ 'Microsoft.Compute/virtualmachines' 
| summarize count() by tostring(OsOffer) 
| project OsOffer, total=count_"
VMs count by size
Search-AzGraph -Query "extend sku = aliases['Microsoft.Compute/virtualMachines/sku.name'] 
| where type=~'Microsoft.Compute/virtualMachines' 
| summarize count() by tostring(sku) 
| project sku, total=count_"
Disks with illogical sizes
Search-AzGraph -Query "where type == 'microsoft.compute/disks'
| where properties.diskSizeGB > 128 
       or properties.diskSizeGB < 126
| where properties.diskSizeGB > 256 
       or properties.diskSizeGB < 250
| where properties.diskSizeGB > 512
      or properties.diskSizeGB < 490
| where properties.diskSizeGB > 1024 
       or properties.diskSizeGB < 1000  
| where properties.diskSizeGB > 2048
      or properties.diskSizeGB < 2030
| where properties.diskSizeGB > 4096
      or properties.diskSizeGB < 4090
| project Name=name, Size=properties.diskSizeGB, ResourceGroup=resourceGroup, Subscription=subscriptionId" 
PaaS SQL Databases count by type
Search-AzGraph -Query "where type=~ 'Microsoft.DBforMySQL/servers' 
or type=~'Microsoft.SQL/servers/databases' 
or type=~'Microsoft.DBforPostgreSQL/servers' 
or type=~'Microsoft.DBforMariaDB/servers' 
| summarize count() by type 
| project type, total=count_ 
| order by total desc"
PaaS SQL Databases count by location
Search-AzGraph -Query "where type=~ 'Microsoft.DBforMySQL/servers' 
or type=~'Microsoft.SQL/servers/databases' 
or type=~'Microsoft.DBforPostgreSQL/servers' 
or type=~'Microsoft.DBforMariaDB/servers'
| summarize count() by location 
| project location, total=count_ 
| order by total desc"
PaaS SQL Databases overview
Search-AzGraph -Query "where type=~ 'Microsoft.DBforMySQL/servers' 
or type=~'Microsoft.SQL/servers/databases' 
or type=~'Microsoft.DBforPostgreSQL/servers' 
or type=~'Microsoft.DBforMariaDB/servers'
| project name, type, location, subscriptionId"
Storage Accounts count by Location
Search-AzGraph -Query "where type =~ 'microsoft.storage/storageaccounts' 
| summarize count() by location| project Location=['location'], Total=count_"
Storage accounts HTTPS Only check count by Subscription
Search-AzGraph -Query "extend HTTPSOnly = aliases['Microsoft.Storage/storageAccounts/supportsHttpsTrafficOnly'] 
| where type =~ 'microsoft.storage/storageaccounts' and HTTPSOnly =~ 'false' 
| summarize count() by subscriptionId 
| project subscriptionId, Total=count_"
Storage Accounts overview
Search-AzGraph -Query "extend HTTPSOnly = aliases['Microsoft.Storage/storageAccounts/supportsHttpsTrafficOnly'] 
| extend 
Type = aliases['Microsoft.Storage/storageAccounts/accountType'], 
BlobEncryption = aliases['Microsoft.Storage/storageAccounts/enableBlobEncryption'],
FileEncryption = aliases['Microsoft.Storage/storageAccounts/enableFileEncryption']
| where type =~ 'microsoft.storage/storageaccounts'
| project Name=['name'], Kind=['kind'], Type, HTTPSOnly, BlobEncryption, FileEncryption, Location=['location'], SubscriptionID=['subscriptionId']" 
|ft