What is the most appropriate nursing diagnosis for mateo, considering his speech development ?

7-month-old Mateo’s parents express concern because he is not babbling or making any sounds. Mateo’s older sibling is already speaking in short words at this age. Mateo’s mother is worried that he may have a speech delay, especially because other children his age are vocalizing. Mateo’s grandparents are concerned as well and believe he might be “shy.”