White spots

You also have a nitrogen and magnesium deficiency. Happy growing

They appear as teeny tiny little wormy caterpillars eventually turn to little white flys, as caterpillar they puke all over and come out mostly at night, they hide on underside of leaves, should notice little black tiny eggs. Noticable by eye but very small.

90% sure it's thrips, once you had em it's very distinctive.

That looks like thrip damage. You’d be lucky to catch one on microscopic camera. If you don’t have great vision they’re really hard to spot by eye..