Totally agree with those who say to you. Invite her over, and shower her with love. I also have a g.son doing his first year at Uni. Fortunately, there are others in his halls, so he is not lonely. Obviously, been a strange first year, and he is very unhappy that he has had no lab work at all (He is doing Chemical Studies). He only went home for a few days at Christmas and returned to his halls, before the lockdown. He says, he will stay there through the Easter hols, as exams soon after and he can study better there than at home.
Another g.child doing A levels. Hopes to start her Social Work course in September. Her Mum (my eldest daughter) manages several NHS Mental Health teams and I know how much these teams need more people trained and qualified in the various sections of mental health work. Your GD is doing such a worthwhile course of study. Do encourage her to stick with it. We need many more people like her.