No, all of ServiceStack .NET Core packages (Except for the new gRPC support in ServiceStack.Extensions) are .NET Standard 2.0 builds which can run on .NET Core 2.1+, ASP.NET Core 2.1 on .NET Framework and .NET Core 3.x.
No, all of ServiceStack .NET Core packages (Except for the new gRPC support in ServiceStack.Extensions) are .NET Standard 2.0 builds which can run on .NET Core 2.1+, ASP.NET Core 2.1 on .NET Framework and .NET Core 3.x.