I have it on the upper leaves on an other plant as well is that normalI would assume salts from nutrient splash after the water evaps away
Scoped it and looks like yellow little balls I’m assuming eggs so I dosed the plants with dr zymes and will asses in the morningClose up picture with a scope if possible will help. But that looks like pests from quick glance.
Yes I know it’s not pollen just resembles it but I treated it with zymes and right back to normalYou don't get pollen without pollen sacks / bananas.
Looks like you have some sort of mycelium growing in the grow medium (magic mushrooms? )
Maybe give the plant a good spraying with reverse osmosis water, deionised water, distilled water or if need be just plain tap water to give it a good clean.