I can compare him to my now 5 yo (6 May) if it helps.
doesn'tt talk, he attempts to say few very basic easy single words the video of DS at 3.5 is all oh oh eh sounds. I know what he's singing because he's mine but it's just noise really. Speech therapy helped. When he started reception they struggled to understand him but nursery thought he'd really progressed. When he started yr1 they thought his speech was behind but reception though he'd come on amazing. It Def came in leaps. Lots of getting him to talk through what he's doing when he's playing helped and gentle corrections. "E oh im". "Yes, he got him" etc. He's stil under speech but he's mostly comprehensible to strangers.
quite limited understanding on what others say to him, yup. It's got better in the last few years and school Def helped because there was a routine and repitition to it. Slow and broken down instructions help
When trying to get him to repeat words he usually just shouts random notices and doesn't even attempts to try he is trying. Say Cat. Bla. Yes that's right, cat, good try. Repetition and positive praise. Yes it's frustrating
he spends most of his day shouting DS still makes a lot of noise, it's like he needs the sensory input. Random noise, noisy toys etc.
Can you try kneeling down, holding his hands still and him stop, listen? He's better if he's being physical.
won't sit still, he's constantly on a move it amazes me school get DS to be still. He never is and like your son, zoom therapy is done sitting on a million different positions, upside down, running around. A part of me thinks it helps but doing home learning with him upside down drove me potty. As above it seems he copes better of he's at least noisy or mobile.
not potty train firstly, you need to check for constipation. Secondly utter sympathy. DS has been in pants since Jan. Yes, this one. Some issues with undiagnosed constipation but also he just doesn't care. He'll sit in wet and soiled clothes, he'll smell. He doesn't understand why that isn't ok. No frigging advice. Except constipation was a game changer.
can't do most basic things for himself Answer honestly - do you just do it for him because it's easier given everything else going on? I think in part I did. School had less time so PE helped a lot. And doing half jobs. T-shirt over head, let him do his own arms etcm. He still struggles with zips, can't do buttons, often gets stuff back to front and will happily let me do it. Concentrate on getting him to do it when you're not time bound with school run etc.
I am sure if I just let him walk off on his own somewhere he would walk into the road I think there's an element of age but also it does tie into the other issues clearly. Not a problem we have I don't think as he is quote cautious about some stuff
At 4 DS was Def immature for his age. He'd been a bit early and v poorly and had a goat bit of mechanical ventilation so we'd always been told he'd have issues. However despite all that he is mostly a "normal" boy, a bit young for his age, average academically, some sensory issues. It's been hard to access help but a good school and an EHCP has made a difference.
If you get your school of choice, proactively speak to them about your concerns and how they can help you