I'm not too sure if it's a must for them to learn to wave bye bye and clap their hands but waving bye bye was my baby's first action. Then he started to imitate our actions like clapping and "smacking" his head. And it doesn't happen overnight. We repeatedly did those actions till one day he just did it on his own. When I went for his one yr check, the nurse did ask if he was able to wave bye bye.
Refer to your health booklet. By 15th month, there are a few actions they must be able to do so I'm planning to train him.