How do I remove a passcode on my iPhone 12?

Not recommended......but if you want to remove the passcode requirement......

Tap Settings

Tap Face ID & Passcode

Tap Turn Passcode Off

Follow the prompts

Now, anyone who picks up your phone will have complete access to all of your personal data on the phone. In fact, they will be able to completely lock you out of your own phone.

Using a passcode in any iPhone is very important because if you want to cards to wallet you need passcode beside Face 🆔 , to use apps that for security needs Face 🆔 you need the passcode if you enable passcode from your iPhone you are exposed in case you lose your iPhone or u get assaulted the thieves can get into your iPhone easily