What words does your LO’s day?

Hi

Just wondering what words can your LO’s say? Mine is 13 months and says Dada, Mama (when he hungry or wants something lol), Nana, Hiya, Yea. Sometimes says Du for duck and he’s trying to say other words like ball, bye, night but not quite there.

Do you have any tips to help speech? Just wondering if this is a normal amount of words. We read every day and I slowly repeat words. He’s very good at following instructions but I know some babies who can say lots and lots of words, just interested in any tips?? Certain books etc..