Pixhawk 5x Ethernet

Hello, I installed arducopter 4.5.0 beta 2 on my pixhawk 5x through the mission planner firmware update function. I was hoping to see the new NET_ENABLED parameter show up in the all parameters list but it wasn’t there. Is this param not available in the beta builds or for the 5x? Or is there anything special to do to get it to show up? Thanks!