Open Settings
Tap Wi-Fi
Tap the connected network name
Tap Password
Authenticate with Face ID, Touch ID, or passcode
View the Wi-Fi password
On iOS 16 or later, you can also go to Settings
Tap Wi-Fi
Tap Edit in the top right
Authenticate
Select the saved network
Tap Password to reveal it
If you use iCloud Keychain, you can also find saved Wi-Fi passwords on a Mac in Keychain Access
If the network is not saved on the iPhone, you cannot view its password from the iPhone alone