How do I prevent accidental taps on the pin keyboard in my pocket with the new iPhone update?

If you have a forgotten/unknown device passcode, or have a disabled device (device unavailable or lockout screen), you unfortunately have no option but to erase the device. However, you can eventually restore the data and settings from a backup you made before the device was disabled, or if you were using iCloud to store that data. If you end up having to use a computer and you do not have one, borrow one from a friend, or go to an Apple Retail Store or Apple Authorized Service Provider. You can also use a PC with iTunes. You will likely also need your Apple ID and password. All Apple mobile devices follow the same general procedure but the link below, and other links off it, provides system and model specific instructions:

If you forgot your iPhone passcode or your iPhone is disabled - Apple Support

If you reset your passcode in the last 72 hours and have forgotten it, read this article about a special reset service available in iOS 17 and higher. --> Temporarily use your old passcode when you forget your new passcode on iPhone or iPad - Apple Support

If this is accidentally happening in your pocket, get a better case or stop keeping it in your pocket.

Pwow wrote:

New update pin keyboard so big it is being tapped in my pocket and now saying I forgot my password and locking my phone.

[Re-Titled by Moderator]

Original Title: Update keypad for pin too big and swiping in my pocket wrong pin and locking me out of phone if I don’t close it

This has nothing to do with the new update. Carrying your phone in a pocket has done this for several years. This is why I don't carry my iPhone in my pocket. But you can stop this from happening completely, by opening Settings > Accessibility > Touch - turn off Tap or Swipe to Wake. This will stop this from happening, but you will need to train yourself to tap the side power button when you want to open your iPhone screen.