My recently turned 3year has limited vocabulary , can yo suggest ways how to improve on

A. Hello good afternoon !! Baby having speech delay or speaking less very few words।। Generally by 2.5 to 3 years babies start speaking sentences two,three words sentences, responding with sentences ... Observe other milestones eye contact, responding to commands,his name, mingling with same age kids or not , interested in activities like sitting at one place for atleast 15-20 minutes (fixing blocks, colouring,play dough), arranging or sorting things,toys, colours, starting conversation... If you observe delay then consult speech therapist /developmental Pediatrician for assessment, therapies are very helpful...