No Airplay icon on Macbook pro

Hello, i would like to know if Macbook pro early 2011(8GB RAM & i5) with High Sierra, can Airplay or mirroring on the new Roku update (now offering Apple Airplay or screen mirroring) ?

As i've seen, the system and OS version should allow it but never worked...?

My iPhone can perfectly Airplay or Mirroring on my Roku TV but seem like the icon just won't appear on my mac.

Same network as the Roku. No success...

Maybe a broken/not installed package/library ?

The "show mirroring icon in topbar" or something like that, in "Display" setting is checked to..

And correct me if im wrong, but this should be working over wireless on the Wifi, right?

if someone can help me, i will appreciate it :)

thanks all