Know several kids who just started their college “experience”. Very different and difficult during covid. Fewer activities and gatherings. Harder to meet people. Feel bad for this cohort.
That said, she is not alone. Many feel the same way regardless of how extroverted / introverted they are. Take things a day at a time and don’t be too tough on herself. She doesn’t have to force the issue and “be on” all the time as that isn’t natural for her. Hopefully she’ll make one friend and grow from there.
It just takes time.