There are several options to reset your two-step verification PIN.
If you provided an email address when you set up two-step verification, you can reset the PIN immediately by requesting a reset link.To reset the PIN:
Keep in mind, deleting or reinstalling WhatsApp won't disable or reset the PIN for two-step verification.
After the 7-day period, open WhatsApp > tap Forgot PIN? > Reset.
Note: For security purposes, there isn’t an option for us to speed up the 7-day timeframe or disable your account after two-step verification is enabled. The two-step verification PIN is different from the 6-digit registration code you receive via SMS or phone call.