Ideas
I just purchased the Essential Lashes maker pack and tried to add the new eyelashes to my male sim. Even after removing the "feminine" (and all other) filters, only two eyeliners and none of the lashes are selectable/visible when I have a male sim selected. I also tried changing the male sim's clothing preference to feminine - the lashes still wouldn't show. Changing the sim's frame to feminine, adding the lashes, and then changing it back to masculine also didn't work - it removed the Essential Lashes and replaced them with other (Lovestruck) lashes instead.
All 10 work normally with a female sim selected. If this is intended, it should be noted in the product description; I definitely would not have purchased gender-locked eyelashes.
I have no CC or mods whatsoever.
Thank you!