We had a rocky transition into secondary with my autistic ds, helped enormously by a great school that were incredibly supportive and dedicated. The fact that we had a diagnosis was also a huge help because while the school weren’t necessarily seeing the difficulties directly, they were better able to connect the dots and trusted our perceptions.
In primary they were focused on toughening the kids up for the worst version of secondary they could imagine. In 5th class (I’m in Ireland and that was the second last year of primary) the teacher was deliberately harsh with the dc, punishing them for minor mistakes like missing a question on their homework, on the basis that they would get detentions for that, and refusing to interact with parents because they wouldn’t be allowed through the door at secondary and the kids had to learn to speak up for themselves. The woman was an absolute nightmare, and literally gave ds nightmares.
We chose a really, really good school (and I recognise how lucky we were to have the choice) and that is one thing I’d encourage you to look at carefully, if you can.
But also listen to what the narratives about secondary are, and work with him to deconstruct them. This is a vital skill to learn - or at least it has been in our case. Ds is so sensitive to teacher stress and we had to work hard to manage exam anxiety because his system was being driven into overdrive by teacher stress.
I would seriously consider taking him out of primary early - I’m not sure of the logistics of that in the uk, working around school fines etc. can a gp sign him off for anxiety? I wouldn’t rush to homeschool, or take it completely off the table, but these last few weeks of madness might be better missed.
It’s not all or nothing. People will try and tell you that if you give in at all, it’s a slippery slope to school refusal but we have managed to keep ds in school by being flexible when he needed it. Our attendance drops at the end of every term in that loosely-goosey energy.
I’m so glad we held out, because ds has had brilliant experiences I couldn’t have manufactured at home. He’s a part of a community, he represents his school at events, helps transition primary kids in, and runs a lunch time club. His autism, and his struggle with school are actually considered valuable attributes.