It's a bit of both. 'Young Rock' is a fictionalized account of Dwayne Johnson's life. While it's based on his real - life experiences growing up, there are surely some elements of dramatization for entertainment purposes. For example, the show might exaggerate certain events from his childhood to make them more engaging for the viewers.
The setting makes it seem factual. The different places where Dwayne Johnson grew up are accurately depicted in 'Young Rock'. However, some of the conversations and interactions are probably fictionalized to make the story more interesting. For example, a conversation between him and a friend might be made - up but set in a real - life location.
It's not all completely true. Young Rock likely takes inspiration from real-life experiences but adds fictional elements to make it more engaging and dramatic.
These stories are most likely fiction. The idea of having 'horny' in relation to a niece is inappropriate and goes against ethical and moral norms. In real life, family relationships are based on love, respect, and propriety.