Very young fry of licorice gouramis is hard to detect in a fully established tank with plants. Mostly it resides near the bottom for one week or even more, but it depends on the tank-structure. If there are many plants and pieces of wood, fry could to be found at higher places too. But mostly it prefers the lowest places. But even knowing this it could be overlooked. Normally it will find enough food at that places if the tank is old established. But you must feed rotifiers and/or nourishing infusoria actively. Mostly, from 14 days on the fry will become more apparent at different places in the tank, including the surface. There are many cases in which a rather large amount of young has been detected very lately (several weeks), if there are many hiding places and a good base of nourishment.
But these facts – especially the difficult control of feeding – motivate many breeders to breed their licorice gouramis not in such tanks but in “empty” containers separated from the adults. Otherwise a breeder could hardly do a rational job; it’s all working by chance. The more natural method but at the same time the more unpredictable surely is yours.