This is meant more for the games board.
ok please delete, i have made the thread in the games board
ummm. You should probably first go into stuff that disapproves race science and other stuff that is used to justify slavery. Stephen Jay Gould wrote a book about it. You could also probably look into what authors of the game were trying to say about slavery, there should be interviews. I think this question has better likely hood of being answered if you were to remove the layer of final fantasy from the text. I didn’t play the game so idk.
Just started FFXVI and just from the first few hours of the game (which is great so far) I'm not sure what exactly you want to get from this. For the most part the world of the game is in pre/early feudal slave economy, with production being carried out by a combination of unremarkable peasant workers and magically talented slaves bound to a nobility class defined by their relation to the mothercrystals.
I can certainly see the merit in taking this as an opportunity to analyze a fictional society, in order to build up confidence in your ability to analyze more generally, but don't expect to get many direct lessons about the modern day from it. This isn't a Disco Elysium or even Cyberpunk 2077 where themes and plot beats have direct implications on the modern needs of the movement.