How can Screencast / screenmirror the display of my A7 pro to my TV / Fire TV?

All my other phones using android 4.4-6.0 have and option to enable it in the display menu and the quick settings menu.

Please could anyone tell me where is the screencast option enabled in the A7 pro, I can't find it!

Thank you.

P.D. my A7 pro has firmware version V0.12-20171031 that seems to be the latest available at this moment.

Will soon have some infos about that.