Child just graduated as a business admin bachelor but not able to get hired so far

My child just got her bachelor's degree of business administration from a top undergrad business school this May. Has been interviewed many times in the past 6 months but so far no job offers.

Her GPA is 3.8 and demonstrated strong leadership in college activities. She did an internship with a famous company but did not get an offer from it.

My question is what could be the reason? Is it because the current job market? What are your job hunting experiences if you are a newly graduated business administration student? Any advices?