Why CornExpressionDescriptor is only available on .Net Framework

I was wondering why I can't see the descriptor of CornExpression in my project as It was available since version 1.7 and I realised that this has been filtered for .net core assemblies on purpose.

https://github.com/HangfireIO/Hangfire/blob/d4bd522037ddddff64f9ecd0c58e42e45fad385f/src/Hangfire.Core/Hangfire.Core.csproj#L13