Hi there @Claude31, I posted the workflow in a comment of my original post.

@Claude31

Ok for the Report alert. "Stacking alerts should be avoided" Do you have any source for this? Not that I don't trust you but I haven't seem that anywhere I looked at. "Have you considered having the textField (to report other) inside this action sheet and allow user interaction with the textField only if user hit other ?" Is this even possible? I've never ever seen that. If so, is it compliant to the guidelines? And how would I do that? Finally, what about the Block alert? Because it doesn't seem consistent to use 1 action sheet among 2 other alerts, does it?

@Claude31 "First" meant "the first UIAlertController to show up, nothing more. It's the Report alert with the 5 reasons I mention. Its actions are: 4 report reasons, 1 "other" reason (which opens the alert with textfield) and the cancel button. Each reason of reporting also calls the handler launching the Block alert which asks to block the reported user or not. Finally, even if the alert asking yes or no for blocking is launched is called if you choose to report the user, you can also individually launch it, as the report alert, from the UIMenu in the UIBarButtonItem in the UINavigationBar, which has a "Report" action and a "Block" action.

My bad @Claude31, I updated my post