Call them. They are unlikely to be able to give you information about your daughter, but you can let them know - and they need to know.
Don't worry about the arguments that parents shouldn't be getting involved with universities on behalf of their children, this is a different type of situation and it's important to have all areas of support involved.
My mum contacted my uni when she was diagnosed with terminal cancer, and it was so necessary, because I was closing myself off and in absolutely breakdown mode.
More similarly to your concerns, my uni knew when I became anorexic. My dad (mum had died by the time I did my MSc) didn't speak to them at all, but I can tell you how the university supported me if that would help.
They were very informal with it at first - my lecturer and supervisor would let me sit and just talk to him if I needed to, he would reassure me about my academic ability and encourage me towards support. He also spoke to the Mental Health Advisor on my behalf, and I had appointments every fortnight there.
When things became worse with the anorexia, they took it down a more formal route: a SARA (reasonable adjustments) statement to say that my marks might drop or I may struggle with motivation, concentration or withdrawal as I deteriorated.
Eventually in my case, things deteriorated too quickly and my uni went down the route of saying if I didn't agree to intermit for at least 6 months, they were heading towards taking it out of my hands and going down Fitness to Study procedures. I had no choice in the end - I was hospitalised for 5.5 months. But had I not been, uni would have done that.
So I really really really do recommend you/your daughter to try to open up and get that support if possibe.
As an aside, if you ever want to talk about this please do feel free to contact me on here (and same if you think it would ever be helpful for your daughter if she was willing to. Absolutely no worries if not - I'm 28 so older than uni days now, but I had severe anorexia during my MSc back in 2013-15, so pretty recent, and I know how horrific it was. So the offer is there anytime).