How do you start a grpc server with port sharing

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C#

.NET

RPC

I am trying to make the move from WCF to gRPC so that I can use .NET5. I am stuck unable to proceed because I need to have multiple programs (hosting gRPC servers) using the same port. In WCF it was fairly simple - you needed to have NetTcpPortSharing service running and then specify that port sharing is enabled in the binding as shown below:

Class1 c1 = new Class1();
ServiceHost host = new ServiceHost(this);

var binding = new CustomBinding();
var binaryMessageEncodingBindingElement = new BinaryMessageEncodingBindingElement();

binding.Elements.Add(binaryMessageEncodingBindingElement);

var tcpTransportBindingElement = new TcpTransportBindingElement
{
	PortSharingEnabled = true
};
binding.Elements.Add(tcpTransportBindingElement);

binding = new CustomBinding(binding);

host.AddServiceEndpoint(typeof(IClass1), binding, new Uri($"net.tcp://localhost:1055/IClass1"));
host.Open();

How is this done in gRPC?

What I have tried:

I am unable to find much of any discussion of this anywhere. If this cannot be done, it is going to keep us stuck in WCF and on .NET Framework 4.8 indefinitely.