You can create vm under resource group using below command-
- Create resource group-
New-AzResourceGroup -Name 'myResourceGroup' -Location 'EastUS'
- Create virtual machine-
you can also check msdn link- https://learn.microsoft.com/en-us/azure/virtual-machines/windows/quick-create-powershell
New-AzVm `
-ResourceGroupName 'myResourceGroup' `
-Name 'myVM' `
-Location 'East US' `
-Image 'MicrosoftWindowsServer:WindowsServer:2022-datacenter-azure-edition:latest' `
-VirtualNetworkName 'myVnet' `
-SubnetName 'mySubnet' `
-SecurityGroupName 'myNetworkSecurityGroup' `
-PublicIpAddressName 'myPublicIpAddress' `
-OpenPorts 80,3389