It is not uncommon for a 2.5-year-old to have a limited vocabulary and struggle with communication skills. However, if a child is not saying any words at all or is significantly behind their peers in language development, it may be a cause for concern and it would be advisable to consult with a pediatrician or speech therapist.
There can be many reasons why a child may have delayed speech, including hearing problems, developmental delays, or conditions such as autism spectrum disorder. A professional evaluation can help identify any underlying issues and provide appropriate interventions and support to help the child develop their communication skills.