"Voice", eh? Since ChatGPT can be instructed to write in different styles (I've had it write historical accounts in iambic pentameter, and in stereotypical pirate patois), that should be easy to fake. You get a rough draft from ChatGPT that sounds like you grew up in the 'hood, then polish it a little both to make the faux African-American tone more realistic and to sound like you know something, and hey! presto! a winning Columbia admissions essay.