22 month old can’t say L sounds

Meagan

My 22 month old says tons of words but can’t say the L sound, replaces them with n sounds. For example, “hello” is “heno”. I know he’s soo young but I’m wondering if this is just normal or if I should do more to help his speech, or just wait it out for him to learn. I try to have him practice with la la la but the sound just doesn’t come out. Thanks! Ftm