Did your kid call you at camp or did the camp call? When did your kid arrive? Often it takes a few days to get in the groove of camp.
I do think that some camps are just better suited to younger kids than teens -- that is why some camps incorporate longer trips for older kids. But since your kid just arrived my guess is that she has not had time to be bored yet.
It is frustrating to spend that much money and not have them love every second, but my guess is your kid will still have a great summer.
This article may help:
https://www.nytimes.com/2023/08/06/health/summer-camp-mental-health.html
“She was definitely crying before bed,” Ms. Klein said on the phone to a mother. It was a delicate balance; before drop-off the previous day, the girl’s mother had told her she could come home if she wasn’t happy.
Ms. Klein was intent on shoring them up, mother and daughter. “I really don’t think she needs to go home,” she told the mother. “I want her to use those struggle muscles and understand she can do hard things.”
Homesickness has always been part of camp, but in recent years it has become more acute and difficult to manage, she said, perhaps because of the habit of constant communication between parents and kids.
“We used to work with parents and say, ‘We can get your child through this,’” she said. “Parents used to trust us much more.”