Daughter's loss of appetite

My daughter, who became a college student this year, doesn't eat well, so I'm worried.

I used to eat breakfast well and didn't have many food preferences, but after becoming a college student and working part-time jobs more often, especially early in the morning, I haven't been eating rice at all.

I'm not sure if it's an eating disorder, but it seems like there is an appetite loss phenomenon caused by various reasons.