I forgot my Wi-Fi password

See -> If you need help with your Wi‑Fi password

If you need help with your Wi‑Fi password – Apple Support (UK)

•  You need to sign in to your router.
• The Wi-Fi network name, or SSID (service set identifier), is the name your network that has a password.

or If you have iOS 16 / iPadOS 16:

Go to -> Settings -> tap Wi-Fi -> tap on the hidden Password -> enter Passcode -> you will then see the Wi-Fi Password.

If you never changed the password from when your internet provider installed it, it may be on a sticker on the bottom of your router. If it's not there, you'll need to contact your internet service provider for help resetting it.