You know, I've been thinking about it, and I see two possibilities:
1. She wanted to fake a role in GTA VI to jump on the bandwagon and farm followers, hate, and money, clinging to the lie despite how obvious it is and coming across as a ridiculous attention-seeker, with the possibility of getting sued by Rockstar.
Or:
2. They really did call her for the game (who knows, it could happen, some pervert wanted her so could smack her ass), but due to her contract, she can't show anything from the production, so she's showing that AI footage. If that's the case, she could rub it in people's faces that she was telling the truth, farming haters, followers, and fame—a curious move.
I don't know if she's or her simp manager are smart enough for that, but with the money she has, it wouldn't have cost her anything to rent a small room and fake the 3D scan with props and real people
I've attached an AI video of what I'd like to see from her