Writing about launching a startup business

Hi, my son is a founder of a tech business which will be launched in January 2021. He is thinking about writing his challenges that he is facing (investors, clients, it development etc). He has a team working with him who will be responsible for the startup while he is in college. Do you think it’s right to write about this in his essays or it might harm his application in case the colleges think he will not be focused in his studies? Please advise me! Thank you!