It is good that her college have been in touch as you need to get university disability services and accommodation both on board as well as the DSA stuff.
It is worth contacting disability services and accommodation at her insurance choice too. On the whole universities would rather be forewarned even if she doesn't go there in the end.
I would also say try to get the needs assessment done as soon as possible as it can take time to get everything organised and you want everything in place before term begins.
My dd is in 2nd year (though not at Oxford). She has complex needs including chronic pain and mobility problems.
Here is a list of some of the equipment and adjustments she has which I hope will be useful at least to give your dd an idea of what is available.
Through DSA:
An ergonomic chair and footstool for studying in her room.
Ergonomic equipment for using her computer (wrist rest, hand rest for using the mouse, adapted mouse, adjustable stand for the screen)
Recording device so that she can record lectures and doesn't have to write.
A printer and allowance for ink and paper so that she can print stuff off easily and doesn't have to trek to the library.
A few hours at the beginning of each term with someone to help her work out access and best routes to lectures, tutorials, library etc.
She has a mentor whom she sees once a week and, although she mainly has this because she also has an ASD, I feel it would be very useful support for any student with additional challenges.
She could also have had but in her circumstances didn't actually need:
Taxi transport from halls to the academic central area.
A suitable bag to carry her equipment and books.
From the university itself:
Exams arrangements - small room, extra time, rest breaks, ability to take food into the exam (as with extra time and rest breaks the exams can get quite long).
Automatic grant of extension for course work if she requests it with no penalty.
She is supposed to get early notification of reading lists but that depends on individual lecturers and can be a bit patchy.
Accommodation:
She has an adapted room with adapted ensuite. She is a wheelchair user though she can walk a little indoors with crutches/sticks. Having the adaptions in the room and particularly in the bathroom has helped a great deal.
Her halls are unusual in having a weekly cleaning service and supplying and laundering bed linen. In addition they actually change her bed for her and empty her bin (most students are expected to do that themselves). What cleaning etc services each accommodation service supplies varies greatly so it is worth finding out what they normally supply and if they can do anything extra.
She is in catered halls as she couldn't manage cooking for herself. She has assistance in the canteen from the canteen staff to manage the self-service. This works really well. In addition the pantry for her room is adapted to some extent (lowered worksurface and sink). It isn't ideal though so another thing worth checking out.
There was a lot of problems with access to the laundry initially but eventually the halls worked out a good solution -again something worth checking out.
She is able to stay in halls as long as she needs too. In fact she has had the same room both years.
Sorry for the long speil. If there is anything else I can help with please get in touch.