how to reset your phone password

The other two replies are correct to “reset” a device to which you don’t know the passcode … which is what you asked.

However, if what you really meant to ask is how to “change” your passcode (i.e. you’ve not forgotten it) … use the following:

https://support.apple.com/en-au/guide/iphone/iph14a867ae/ios

See: If you forgot the passcode on your iPad, or your iPad is disabled - Apple Support

See: https://support.apple.com/en-us/HT211078