Hi Zinacef,
When I tried to activate it I was sent this email:
This email is to confirm that you recently attempted to set up two-step verification for your Apple ID (r•••••@gmail.com).
For security reasons, you must wait until December 21, 2020 at 3:06:44 PM EST before you can begin using two-step verification. You can sign in to the Apple ID account page after this date and time to complete the set up process. For more information, read the FAQ.
If you did not attempt to set up two-step verification or you believe an unauthorized person has accessed your account, you should change your password as soon as possible from your Apple ID account page at https://appleid.apple.com.
For your security, this automated message has been sent to all of the email addresses on file in your account.
If you need additional help, visit Apple Support.
***Keychain was turned automatically off on all of my devices when I did my last OS updates. (both Bid Sur and iOS on my iPad and iPhone). I have never had 2 factor authentication but apparently now you need it to have an iCloud keychain.