NSURL *url = [NSURL URLWithString:@"App-Prefs:INTERNET_TETHERING"];

Thank you for your kind and thoughtful response. I would like to confirm once again. I did not find any URL in the link you provided that leads to the secondary menu of system settings. Does this suggest that iOS 26 does not support this functionality? Moreover, is it possible that versions of iOS 18 and earlier may also not support this behavior in the future?

Thank you for your kind and thoughtful response. I would like to confirm once again. I did not find any URL in the link you provided that leads to the secondary menu of system settings. Does this suggest that iOS 26 does not support this functionality? Moreover, is it possible that versions of iOS 18 and earlier may also not support this behavior in the future?