Turn off two factor authentication

If you enabled 2FA within the last two weeks you can turn it off using the link in the confirmation email. If you enabled it more than two weeks ago, or bought a device with it already enabled, you cannot turn it off.

Two-factor authentication for Apple ID - Apple Support

I used the link in the email to turn off two factor verification. Brave couldn't open the link and I tried Edge. Edge opened the link but wouldn't let me complete the removal.