To share your WiFi password from an iPhone to another iPhone or iOS device, follow these steps:

1. Requirements :
   • Both devices must be running iOS 11 or later.
   • Both devices need to have WiFi and Bluetooth turned on.
   • Disable Personal Hotspot on both devices if it's on.
   • Both devices must be nearby and unlocked.
   • Make sure your Apple ID email is saved in the other person's Contacts and vice versa.
2. Steps to share :
   • On your iPhone (the one sharing the WiFi):
     • Ensure it's connected to the WiFi network.
     • Keep it unlocked.
   • On the other device:
     • Go to Settings > WiFi.
     • Select the name of the WiFi network you want to join.
   • A pop-up will appear on your iPhone asking if you want to share the WiFi password.
   • Tap "Share Password."
   • The other device will automatically connect without needing to type the password.
3. Alternative method (for non-Apple devices or if the above doesn't work) :
   • On your iPhone, go to the Passwords app.
   • Select WiFi network and tap "Show Network QR Code."
   • Have the other device scan the QR code with its camera to connect.

This method works seamlessly between iPhones and other Apple devices, and the QR code method can also be used to share the WiFi with Android and other non- Apple devices.