You say bro split but then you also say compound. If your hitting five day splits focusing on compound movements, you are hitting multiple muscle groups each workout. A typical bro split is chest, back, arms, shoulders and legs. The key to muscle growth is muscle damage and the fact is training each muscle group once a week is not optimal for muscle growth. Will a completely untrained person see some growth? Of course! Is it optimal for the an untrained natty athlete? Absolutely not. Why do you think strong lifts 5x5 is so popular and always recommend to newbies? Full body, compound movements multiple times a week is the best way to build size and strength. Especially for beginners. But take what I say with a grain of salt, just trying to help.