Yes, this pocket door hardware track kit is compatible with your 28" door.
This kit fits door width from 24" to 30", so your 28" door works perfectly.
The required rough-in opening size for a 28" door is 57" in width and 84.5" in height.
It fits door thickness from 1" to 1-3/4", and comes with soft-close mechanism for smooth quiet sliding.
By vevor