Hi op, i have 8 year old on the spectrum. I cant remember how he was at your ds age as by 18 months old i knew something was not right despite every one telling me he was a boy and its normal for him to be silent.
He said his first words at 3, and autism wasnt diagnosed due to him also cuddly and happy and giving eye contact while playing. They told me to wait and see. I couldn't and got him private aba sessions that focused om speech and receptive language.
It was going well and he started labeling items and spoke at a 1 year olds level. Covid hit sessions stoppedand we moved to abroad and that country had stricter rules that lasted almost 2 years and online therapy sessions or nursery was not an option as he had no attention span and such poor receptive language skills.
Fast forward to us moving to another country due to dh job, he was 5 uears old i think and not progressed much from age 3 so i knew i had to find some where he could learn. With no governmental assistance it was hard but managed to find a centre where he could attend speech and aba therapy. I also noticed his stimmming increased, mostly vocal stimmming so i switched him to dairy free gluten free diet just to see if it helped. I dont know if it helped with his development but definitely with his tummy issues. He had constant diarrhea and would get his own pullup out of the drawer to do a numver 2 despite being potty trained and dry at night.
After that he want toilet just fine. Fast forward to now though his speech is slow and steadily improving with some plateaus, his receptive language is age appropriate. He answers simple questions e.g his name, siblings names and other family members, where he lives and can tell us what he wants to do for the day. He has a long way to go as he Can say he doesnt want to go to school but cant tell me why. He struggles with why questions. We couldn't be moreproud of him as a family and definitely he is still that sweet cuddly boy he was at you ds's age.
I know no 2 children are the same especially when on the spectrum, but they always learn and progress no matter how little. Celebrate all his little wins im sure he will do just fine as you are his mum and already trying.