Can I change my password to unlock my phone from another device
How can I unlock my iPhone from another device
iPhone XS
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I'm assuming you mean Passcode (code to unlock device home screen).
The answer i no, you need to use a computer for that:
If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled: https://support.apple.com/en-us/HT204306