Okay,
here is a link to one such product. That link even shows the ingredient list.
The first & main ingredient is DPG - Dipropylene Glycol (commonly used in incense making or to cut fragrances to make them skin safe - Bramble Berry) ( solvent of choice for fragrance applications due to its low odor, low toxicity and low skin irritation potential. - LotionCrafter)
Botanical Name: Dipropylene Glycol Monomethyl Ether
Next is SD40 ALC - I think this is denatured alcohol, but a chemist or someone with more knowledge may correct me if I am wrong.
The final 3 ingredients on the list, and therefore lowest in actual content of the product are pheromones, so it makes me wonder how much of the actual pheromones are actually in the product. Also are they natural or synthetic. But for me it is moot, as I am not going to purchase.
What I conclude from this is that there is a high alcohol content.
But that's not even the issue. The question was would they 'work' in soap? More to the point, would they survive the lye intact? Doubtful. What does survive lye intact and unchanged?
Even if they did, does one lather soap on the skin and just leave it there? No, it is a wash-off product!