Income Less than $10K, 1099-Mix Box 3 and Tax Pay

My child is a student at University.  In 2021 she did research at her school.  School send her 1099-Misc with Box 3 (other income) for the research stipend.  Do we still need to file Federal income tax return if her stipend and total income is less then $10K?  In most case, does she have to pay taxes on that income.  I have noted if you get W2 income, the taxes are usually fully refunded if less than $10K.  Why is this different if she is getting 1099-Misc Box 3.  I was expecting no income tax needs to be paid if income less than threshold amount.  She is my dependent on my income tax.