Promianswered grow question 5 years ago I had white dots on some outdoor Wonder Woman this season. Problem is, I changed two things ^^ so can't tell which one sorted the issue.
I sprayed my plants with borehole water. The fine sediment left a brighter spot, leaf below died. I changed to filtered water. You don't spray.. good on this one, otherwise, check your water.
Second guess was Calcium. I added some CalMag to the feeding and reduced my N to compensate for the N inside CalMag. After those two changes my leaves grew perfect green again.
The spots will never disappear.. so you are good when the new leaves are solid green again.