Cant see photos on my end (not sure why) but by saying 3 wks old and saying holes made me think maybe spider mites... but then again you may be right seeing as you can SEE them lol
Yeah there's no sign of mite or thrip damage, but there are huge holes in the leaves.
They come from places you would never expect, but yeah even in pristine conditions the safe money says that where there is soil there are critters. I just recently got a bout of thrips on my exclusively indoor plants, was baffled as to where they came from, but a week or two of spraying with hydrogen peroxide has seemingly done the trick, I think it screws with their eggs or something. But yeah, i hope the soap works! Your plants look very good other than the damage, which is pretty minor in the grand scheme of things.