On Instagram, 'Unlink Account' Won't Unlink a Facebook Account
Facebook knows so much about its users that it can link their accounts, even when created under different names, from different devices.
28 Aug 2019 ... Facebook knows so much about its users that it can link their accounts, ... it
harder to get access to your Instagram account if you get locked out.” ... Even in
cases where a different name, email address, or device was used to ...