Thanks, I submited: https://plesk.uservoice.com/forums/184549-feature-suggestions/suggestions/17862763-add-in-support-for-net-core-in-linux
Please, vote for my suggestion. :)
No, this are wrong, see the link: https://www.microsoft.com/net/core#linuxubuntu
'.Net core' have support for Windows, Linux, Mac and Docker.
I think when plesk has support for '.Net core' it will be the best