As a secondary school teacher with lots of experience of teaching autistic children, I would say your daughter doesn’t sound university ready and I would hold off on plans for another year or potentially longer. It’s great that she has been able to do her A levels successfully while being online and that it’s a platform that suits her. However, it will be a huge shift between that comfortable and safe environment where she’s at home and never has to be out of her comfort zone, to university where suddenly she has to be around loads of people she doesn’t know every single day. It’s an intense and discombobulating experience for a NT child - for a ND child who hasn’t coped with school, it’s going to be absolutely overwhelming. No amount of support provided at any university is going to bridge that gap.
I would strongly recommend a gap year. Many autistic children I have taught have gone down this route to build their confidence before university and it’s done them the world of good. Setting up a few internships alongside part time jobs has allowed them to develop their people and professional skills, widen their social circles, and get a better understanding of what they might like to do career-wise, all while having the safety and familiarity of home to retreat to at the end of the day. Many of them ended up going to university to study something entirely different to what they had originally planned, and others decided not to go at all and instead got jobs.
Universities have got a lot better in recent years with providing pastoral and learning support to more vulnerable students, but it’s still nothing like the level of wrap around care you get in a school environment. You also have to bear in mind that as your child is over 18, the university will not keep you updated if they have concerns. You have to be confident that your daughter would be able to ask for help and advocate for herself because the level of staff contact is not comparable to school and lecturers are likely to not notice as quickly as a teacher would that your daughter is struggling. Your daughter doesn’t sound ready to do this for herself and so I would be very cautious. I don’t want to be scaremongering, but there are too many suicides of young people at universities in the UK due to poor pastoral support and a lack of parental communication. As such, you have to be 100% confident that your daughter would access the help available to her off her own back before you send her away.
I would also, kindly, encourage her to think outside of the psychology/autism pathway. Literally every autistic girl I’ve taught has wanted to do psychology at university and help people like them as a career, and obviously working with very vulnerable people who need a lot of patience, support and understanding is not really something someone who struggles with social interaction is going to excel at. You need to help her to be realistic about what she will be comfortable doing as a job and what will suit her - and at the moment being autistic is her defining experience and the only lens through which she sees the world, so of course that’s all she can think about for a career. However, you need to be supporting her to broaden her horizons to give her the best chance of meaningful employment in the future.