Disclaimer; hobbyist for 37 yrs but new to discus 4 months ago.
You said the tank has been running 2 weeks. What filtration is on the tank? You have nitrates. How did you cycle the filter?
It actually looks like discus pimples. 1 of my fish had them recently. They are sign of poor water quality. Large water changes, backed off feeding a little and added 1 tbsp salt per 10 gallons and they were gone in 2 days.
I'm sure other more experienced people will chime in...