I will say this on scanning the first chapter, it looks human written to me except maybe grammar checker, which is fine. I have trouble telling these days, but I have almost zero suspicion of AI and for that alone it deserves praise.
It also looks like the author had a lot of fun writing it. This is a premise that could become quite popular if well executed. Maybe OneP inspired but I don't see it beeing an obvious fanfiction. Seems like it was written by someone who might grow into decent writer someday if they stick around and suffer for their development.
Problems: Very unpolished narrative, some cringe scenes that seem gratuitous and unneccessary without proper development behind them, too many one sentence paragraphs, some formating clunk.
But I'm writing myself, and only scanned, not enough time to do it justice, so take all this with a grain of salt and good luck with your story.