@crazycatmum42069
Or will it just correct itself at University
No, it won't. It can't "correct itself" because it needs your DD to be proactive. New friends won't come running to her, she has to go out and find them. The good thing is that Uni is an excellent place to make new friends, get new hobbies/interests, improve sports abilities, etc., but only if she seizes the opportunities.
For the first few days, they're all in the same boat, and that makes it a brilliant time for trying new things as everyone else is doing the same. They're meeting new people in their flats who they're going to be living with for the next year, they have the opportunity to go socialising/ (whether or not they're "into" booze) - not just in clubs/pubs, but also in University common rooms, "getting to know you" sessions, campus tours, subject/dept introduction sessions, etc. Usually during the first week (Fresher's week), there'll be a Fresher's fayre where there are usually dozens of stands/stalls showcasing the clubs, societies, sports, etc that they can sign up. In collegiate Unis, there'll be college "meeting" sessions for inter college sports, competitions, socialising, etc.
All the opportunities are there, but the student has to go out and get stuck in. Yes, there'll be people they don't get on with, activities they're not interested it, etc., but the more you do, the more you're likely to "find your tribe". They won't come looking for you! And as the days, then weeks, pass, everyone else will have formed their friendships/interest groups and it becomes harder and harder to muscle in if you weren't "in there" at the start when everyone was new.
Once formal "teaching" starts, unfortunately, those who've made friends will be grouped in lectures together and those who havn't will find themselves sat on their own, and the "friendship groups" will either not notice them or will assume (rightly or wrongly) that they're loners and not interested in getting together.
University student/parent forums are full of posts about students who are lonely, have no friends, etc., and it's heartbreaking, especially when there's so much going on at most Unis, but it really is up the student to put on their "big girls pants", step outside their comfort zone, and get on out there, especially in those first few formative days!