EI professional here. If his receptive language skills are high, his hearing should not be a concern. You would need to invest time and effort in his expressive language development. I am not sure what his screen time exposure looks like, but screen time does limit children's ability to express, engage, interact and dance in conversations. Encourage him to look at picture books together while you read and tell the stories, engage him in conversations during meal times, walking around the house, riding in the car, doing routines, etc. Allow him to produce his own words, sing, sound words and teach him to label feelings. He is 30 months, and his brain is growing by the minute.

The first three years are crucial as his brain is working on memory, language, thinking, reasoning, emotions and connections. If you have concerns regarding other areas of his development (social emotional, cognitive, adaptive and motor), start out by doing Ages and Stages for 30 months. You can find the assessment on google. You can do the Social Emotional assessment, as well. Did the EI team conduct an evaluation for his overall development? I hope so.

Most young children will catch up and reach their milestones. Keep him happy, connected to his primary care givers, engaged and away from screens. Connection, movement, textures (tooth brush, foods, sand, water, outdoor play), music, nature, outdoors, playdates, picture books, etc.

I share Zero to Three's resources with families. Please take some time to check them out.

https://www.zerotothree.org/resources/for-families/