Yes. And he would need to file to get back any withholding taken out.
Filing requirements for a dependent
https://ttlc.intuit.com/community/children-dependents/help/do-i-need-to-file-my-own-taxes-if-i-m-a-d...
You may have to pay the Kiddie Tax. I don't know how that all works. The Kiddie Tax is on unearned income over $2,500 (2023). Turbo Tax article
https://ttlc.intuit.com/turbotax-support/en-us/help-article/small-business-processes/2021-kiddie-tax...
