If you don’t receive the text or call on the date and time it shows account recovery will be ready, you can still go directly to apple.com/recover and follow the instructions to regain access to your Apple Account.
Also important during the wait period make sure you are also following How to use account recovery when you can’t reset your Apple Account password - Apple Support to prevent mistakenly canceling the recovery process. Like “If you submitted your account recovery request with iforgot.apple.com through your device's browser, you should avoid using that device during this period. Using that device might cancel account recovery.”
and “To avoid delays, turn off other devices that are signed in with your Apple ID until account recovery is complete. "