not mold.. nothing is effective against wpm, fyi. Even the commercial grade fungicides large farms have access to but consumers do not are only 25-33% effective - and that's a shit-ass rate. that's the dangerous stuff they can't trust average people with, lol.
think mites put their eggs on underside of leaves? some of those pictures are blurry.. could it be an odd angle of trichomes with light blasting through?
just make sure any of those white things have a 'stalk' as opposed to an orb directly on the leaf surface and all is well.