Reset iPhone passcode

No way to do it with your iPad. You will need to follow the link already provided or this link to use your Apple ID password.

If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support

In either case the device will be erased and you will need a recent backup to restore your data.

Hello,

If you forgot it you are locked out... You will have to restore: If you forgot your iPhone passcode - Apple Support

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Is there a way to reset my iPhone 14 plus passcode with my iPad

No, not with an iPad. Yes, with a Mac or PC Here's how: If you forgot your iPhone passcode - Apple Support

You should also be able to reset without a computer. Here's how: How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support

Once the iPhone has been reset, you can use your current backup to restore data back to the phone.

Kindof... if the phone has a data connection, either wifi or cellular, you can use find my on the iPad to initiate an erase of the phone.