Should I be worried?

J

My 20 month old only really says mama or dada and nothing else really and doesn’t know what mama or dads actually means. He will copy sounds but not words, he babbles a lot but still no words, I think he does try sometimes though.

Everything else is fine, he’s on time with everything other than talking so just wondered if anyone else is dealing with this or has done that can give me some advice?

Thanks :)