How can I enable the reports menu in SQL databases
I think it's not because of the version of your DB server but because of the version of your Management Studio.

I tried to connect a SQLServer 2016 with a Management Studio 2014, and indeed, the Report feature is disabled (only for databases).



And then tried with a Management Studio 2016, the Report feature is now available.


So, try to upgrade your Management Studio to the newest version.