Hi! Sorry about that. Do you think you could share a minimal reproduction of this problem using Snack? It’ll be much easier to figure out what’s going wrong if I can try it myself. Thanks!
Well after hours trying to find the issue, the problem is basically related to the app permisions. I hope I can help some people in case anyone faces such an error.
According to the expo docs the behaviour by defaulf of logInWithReadPermissionsAsync is web .
But thats not completely right, since android uses the native app for the facebook login. That was basically the problem, the phone I was using had Facebook with an account ready on it.
What I did to solve it : Add the account as a tester in the Facebook Developers Dashboard.