hi - my DD is at the opposite end of primary school to yours, she's in Y6, just turned 11, but has also struggled terribly going back to school. She just hates it and wants to be at home with us. She begs to be homeschooled but unfortunately we just don't have the time or resources to do it.
We self-referred to CAMHS (it's called something different here but it's the same thing) and she was eventually seen for counselling but was discharged pretty quickly because she wasn't in severe mental distress. Which is good, obviously, but it still left us with a child refusing to go to school and really upset about it. She then got ill with a non-Covid related issue and that made things even more difficult as she had to have quite a bit of time off and it's still affecting her physically so her attendance is really spotty - and then she got Covid and was very ill before Christmas. She's now been referred for art therapy, which we start next week and I'm really hoping it will help her settle a bit.
She is far from the only child in her class struggling - have you spoken to his teachers? Ours have tried to help and are being very flexible to accommodate her needs. Sometimes they don't get it right at all but they are trying so hard - we had some communication issues at first when she moved into Y6 which were compounded by her teachers job sharing but after (nicely!) kicking up a bit of a fuss they are now really good at communicating with us.
I do think our DD is still a bit tired from Covid too, could that be an issue with your DS? I had Covid waay back in March 2020 and it took me about six weeks to feel right again...
Poor things. It's been very tough on them.
I wish I had an answer for you but I'd really suggest speaking to the school - I know some areas have particular schemes running aimed specifically at helping children adjust back to school. I hop