I found a solution and changed only this command:
$createdGroup = Invoke-PatchGroupForDomain -Server $n -DomainId default -Group $group -GroupId $GroupName
to
$createdGroup = Invoke-GlobalInfraPatchGroupForDomain -Server $n -DomainId default -Group $group -GroupId $GroupName
With Get-Command -Module VMware.Sdk.Nsx.Policy we get all the necessary commands for NSX Module.
