Do you have New-AzContainerGroup? Read more
https://learn.microsoft.com/en-us/powershell/module/az.containerinstance/new-azcontainergroup?view=azps-13.5.0It provisions the container group to run the container instance.
Eample
New-AzContainerGroup -ResourceGroupName myResourceGroup -Name mycontainer1 -Image mcr.microsoft.com/azuredocs/aci-wordcount:latest