That's....a hacked up flange I think. Or it was retrofitted onto another car.
Although I own the 2017 version of that Axleback, I'm 100% sure that's not how it's supposed to look like. At all.
I would go back to the guy and get your money back if you bought it from someone on a marketplace.
https://www.ftspeed.com/part/11839-b...toyota-86-2017
Here is the old version. Notice how the flange looks NOTHING like that.