What is the reason for Allah's creation of the cockroach, what is its benefit to humanity, and is it useful despite the fact that Allah has not created anything in vain?

Allah the Almighty, the All-Wise, the All-Knowing, the Most Subtle, the All-Aware, did not create anything in vain. The human mind is limited and ignorant of many secrets of creation. Every creature in the universe is created with profound wisdom. Among these creatures is the cockroach, and its existence holds wisdoms that not everyone may grasp. Some researchers have mentioned a few of these, and while we cannot definitively confirm their validity, we are certain that there are wisdoms behind its creation. Allah has not obligated us to know them.