In iOS development using Objective-C, how to determine if the password for the currently connected Wi-Fi is empty?

I am developing an iOS application based on Objective-C, and I have encountered a requirement where I need to determine if the password for the currently connected Wi-Fi is empty. If it is empty, the user is allowed to proceed to the next step. If it is not empty, they must enter a password. This will be used in the next process, which is the network configuration of a physical device.

After researching documentation, I found two possible approaches to determine if the Wi-Fi password is empty. The first approach is to directly check the encryption type of the current Wi-Fi. If there is no encryption type, the Wi-Fi password is empty. The second approach is to use Apple's NEHotspotConfiguration class to attempt connecting to the Wi-Fi and determine if the password is empty. However, both approaches have encountered issues.

For the first approach, there seems to be no public API available to directly retrieve the Wi-Fi encryption type.

For the second approach, when using NEHotspotConfiguration to connect, I first get the Wi-Fi's SSID and then attempt to connect with an empty password. I am using [NEHotspotConfiguration alloc] initWithSSID:ssid] to create a configuration, and then I call [NEHotspotConfigurationManager sharedManager] applyConfiguration: to connect. However, regardless of whether the Wi-Fi is actually encrypted or unencrypted, no error is returned. The code is as follows:

NSString *ssid = [NetInterface getCurrent_SSID];  // The Wi-Fi SSID that needs to be checked
NEHotspotConfiguration *configuration = [[NEHotspotConfiguration alloc] initWithSSID:ssid];
configuration.joinOnce = YES;
// Remove previous configuration (optional)
[[NEHotspotConfigurationManager sharedManager] removeConfigurationForSSID:ssid];
self.isWiFiEmptyOperateState = 1;
// Attempt to apply the new configuration
[[NEHotspotConfigurationManager sharedManager] applyConfiguration:configuration completionHandler:^(NSError * _Nullable error) {
    self.isWiFiEmptyOperateState = 2;
    if (error) {
        if (error.code == NEHotspotConfigurationErrorInvalid) {
            NSLog(@"Wi-Fi %@ is encrypted, a password is required", ssid);
        } else if (error.code == NEHotspotConfigurationErrorUserDenied) {
            NSLog(@"User denied the Wi-Fi configuration");
        } else {
            NSLog(@"Other error: %@", error.localizedDescription);
        }
    } else {
        NSLog(@"Successfully connected to Wi-Fi %@, this network might be open", ssid);
    }
}];

In the code above, it always ends up logging "Successfully connected to Wi-Fi." Is there any other approach that can fulfill my functional requirement? I noticed that some apps on the App Store have implemented this functionality, but all my attempts so far have failed.