How do I find my wifi password

See -> Recommended settings for Wi-Fi routers and access points

Recommended settings for Wi-Fi routers and access points - Apple Support

The Wi-Fi network name, or SSID (service set identifier), is the name your network.

And every Wi-Fi network name has a Password.

So sign in in the router and check.

If you have iOS 16 go to Settings/Wi-Fi and tap on the i next to the network name, then tap on the word “password”. If you don’t have iOS 16 you cannot get the password from your phone; you will have to get it from your router. If the default password hasn’t changed it will be on a label on the router; otherwise you will have to log in to the router’s admin page to find it.