Would a broken condom be noticeable to the man (realizing a condom broke without filling it up with water). ?

Not usually done: If a person is using single-use condoms, there should be no filling of condoms with water. Modern condoms in a developed country are considered intact and just fine. If there is an obviously torn one after sex, we call it a torn or broken condom. If there is no obvious tear, we call the situation just fine. No water needed. What will be, will be, as the song says.