20-year-old son diagnosed with autism

My son was diagnosed with autism about 2-3  years ago when he was 17. It was a late diagnosis - up until the pandemic he managed in state school and was performing well academically. The pandemic massively affected him and he was not able to complete his GCSEs.

However since then he has completed his A Levels at private school but wasn’t able to thrive at university and left after a month. He is only able to work very part time for a family member. He started to learn to drive but could not continue.

My wife and I have changed the way we work so as to ensure there is always someone at home to support him.

Our son attends a social support group once a week, and when he is feeling more confident/less anxious can look after himself, socialise, enjoy going out etc. However he suffers from mood swings, low mood, exhaustion, etc.

However, he does not accept his diagnosis.

Is anyone else going through this? Or been through it?

Thanks.