Forgot iPhone passcode
Forgot passcode to get into my phone
iPhone 6s, iOS 10
Question marked as
Here you go:
If you forgot your iPhone passcode, use your Mac or PC to reset it - Apple Support
You will need a computer to reset the passcode and it will erase everything on it, but you can restore from a backup. There is an option that does not need a computer, but you will need at least iOS 15.2. You will find a link to this method using the same link from above on the top of that page.