I’ve forgotten my phone passcode. How can I reset without erasing my phone?

Unfortunately, you can't. You will need to reset your phone which will wipe it clean. You can restore from a backup once it has been reset.

If you forgot the passcode on your iPhone, or your iPhone is disabled or unavailable -

Click on the link for instructions on how to reset your passcode without a computer if you have iOS 15.2 or higher.

How to remove your iPhone, iPad, or iPod touch passcode without a computer - Apple Support If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support

Click on the link for instructions on how to reset your passcode using a computer.

If you forgot your iPhone passcode - Apple Support If you forgot your iPhone passcode - Apple Support

Lostwithoutmyphone Said:

"I’ve forgotten my phone passcode. How can I reset without erasing my phone?"

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Refer to this link: If you Forgot the Passcode on your iPhone, or your iPhone is Disabled - Apple Support.