He has nearly a whole year to grow and develop both physically and emotionally. A year is nearly a quarter of his entire existence so while it might not sound much to us as adults , in child development terms it is a massive amount of time.
Keep on working with the speech and language therapist, read to your child a lot so he is getting a rich input of language, join a local library and find out what activities they offer in the holidays and weekends. Try to encourage little acts of independence like putting toys away, clearing his plate away at mealtimes, hanging up his coat/ putting his shoes neatly/ putting on his hat etc, encourage independent toiletting/ hand washing. Encourage the development of physical skills, scooting, balance bike, swimming, kicking a football to develop confidence as well as large muscle skills. Play simple board games, look at the Orchard ones or try traditional,ones like snap or snakes and ladders, great for concentration, language skills, turn taking.
instead of asking directly “ what did you do at school today” think of other ways to elicit information to start a conversation. Did anything make you laugh at school today? Did you ride on the big bike or play in the sand? What was your job at tidy up time? Did you sing any songs today? I wonder if you can remember what fruit you had at fruit time?
But sometimes they just don’t want to talk about school, so talk about other things instead, look for conkers, or yellow cars, count how many dogs you see on the way home, or sing.
Encourage curiosity, take time to look at things closely, this time of year is great for looking at leaves, watching them change colour and texture, shuffling through them, having leaf fights,, looking at spider webs, seed heads etc .