Is it normal for a 16m boy not speaking much

He said words like mama dada hi bye but only if he feels like it. He also learned new words like bear n car. He repeats it for a few weeks when he just learned them. But now I don't hear it anymore. I only heard mama dada if he does speak. He likes to say mamam(means makan/eat) everyday when he's hungry. I've seen kids his age speaking more words than him. Is it normal should I be worried? 😫😫#1sttimemom #adviceappreciated