In order to have full functionality of the throttle and the related indicaters, you need to have a hardware throttle device. A plugin aquires the signals of your thrust lever and sends them to the aircraft, no matter on which axis slot your throttle is assigned to.
No matter what brand or model you have, it need to be a lever or a slider with a potentiometer, so you can control the throttle axis smoothly. CH-Products and Saitek have fine stuff, but even a no-name is better than nothing. The only yet known problems come with proprietary driver logic hindering our built-in Airbus logig. You need to install a neutral driver then!
The Saitek X52
This A380 model for x-plane® 12 has slightly higher requirements regarding the computer system than an average aircraft model. As a general rule one can say, if XP12 runs at or above 20 fps, this model also should work fine. - Otherwise lower the graphic settings of XP!