No.
Most universities have their U18 policies on their websites. Some are more detailed than others.
There are various things like U18 students are not permitted to view an 18 film provided on campus for entertainment but may view it as part of course work.
As a parent you have to fill in a lot of forms, and the universities make it very clear that they are not in loco parentis.
There are grey areas around Compulsory 16-18 education and U18s on university courses where the contact hours are less then the 540 a year minimum for full time education.
Some will insist parents live with the student locally off-campus. Some will allow U18 to live on campus.
Student Unions are issued large photos to go up behind the bar to ensure the U18s aren't served alcohol, and some have an 8pm curfew.
You need to have a very good reason to take that path, and the young person needs to be fully signed up to what it means for them in terms of social and academic life. There are times that the pros massively outweigh the cons, but for most students and most courses and most careers there is no benefit to doing things early.
There is however an issue that because compulsory education is now until term after 18th birthday, you do have to find something to occupy their time. And for some subjects, taking a break is not good and you end up with nothing except university as the next step in that subject. Hence why I say that sometimes it is the right move as there are no alternatives that allow progression other than tertiary.