QuicListenerOptions has SslServerAuthenticationOptions property. https://github.com/dotnet/runtime/blob/79ae74f5ca5c8a6fe3a48935e85bd7374959c570/src/libraries/System.Net.Quic/src/System/Net/Quic/QuicListenerOptions.cs#L16 It looks like code that uses this property assumes that SslServerAuthenticationOptions.ServerCertificate is set. * Need to validate that it is set. * Need to consider what happens when other options are set like a certificate selector callback.