Unable to receive verification code for iCloud account

Do you mean a two factor verification code? Based on Get a verification code and sign in with two-factor authentication - Apple Support and About trusted phone numbers and trusted devices for Apple Account - Apple Support :

A code is sent first, automatically via the Internet (not as a SMS text message), to a trusted device which is some other Apple computer or Apple mobile device signed in with your account. If you have a trusted device running iOS 11 and later, OS X High Sierra and later, iPadOS 13 and later, or watchOS 6 and later, the verification code is displayed automatically on your trusted devices.

If you don’t have a trusted device handy, you can choose to have a verification code sent to a trusted phone number as a text message or phone call.

1. Select “Didn’t Get a Code?” or “Can’t get to your devices?” on the verification code screen.

2. Choose to have the code sent to a trusted phone number (select which one—you can have several).

3. You'll get a text message or phone call from Apple with your verification code. This text message might include an additional domain validation line. This line includes the @ symbol, the website name, and your code (for example: @icloud.com #123456 %apple.com).

4. Enter the code on your other device to complete sign in.

Once you have access to your account again It is a good idea to have more than one trusted number.

If you had set up a recovery contact, read Get a recovery code for a friend or family member as their Apple Account recovery contact - Apple Support

If you still can’t receive verification codes, you can request account recovery to regain access to your account. Read about that here ➔ If you forgot your password and can’t sign in to your Apple Account - Apple Support . Account recovery might take a few days or longer, depending on the specific account information you can provide to verify your identity.

If you feel you need to contact Apple, refer to this page for Apple Support ➔

Choose your country or region - Official Apple Support

Select your country (if you do not see your country, also look for "other" in regions; e.g., "Other Africa"), then "Choose a product". Click the "show" item under each category for more selections. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

Here are various special problem scenarios:

If you did not get a code on your telephone:

- Is your phone number listed at Settings > [name on top] > Sign in & Security > Two Factor Authentication ?

- Are you able to receive other SMS messages (green)?

- If you see “Verification codes cannot be sent to this phone number at this time. Please try again later,”:

1) Wait a few hours and try again. Maybe it really does mean not at this particular time. E.g. ➔ Apple ID password reset: no verification … - Apple Community

2) Use this link to check the status of Apple’s various services and servers ➔

Apple - Support - System Status

3) Disable or possibly remove entirely any VPN you are using.

4) Try clicking on, “Cannot use this number?”

- From: Suddenly not getting texts for two factor… - Apple Community

Q: Suddenly not getting texts for two factor authentication on iPhone

A: Reset network settings:

Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings

Welcome and thank you for reaching out. 🤗

According to Apple:

Not sure where your verification or reset email was sent? You can check all of the email addresses associated with your Apple Account or resend the email.

Search for the email:

The email is sent from “Apple”, so you can search for it in your email account. If it isn’t in your inbox, check your folders.

If a spam filter or email rule moved the email, it might be in the Spam, Junk, Trash, Deleted Items or Archive folder. You might also have to change your email address settings to allow messages from email.apple.com.

Make sure you’re checking the correct email account:

If you’re looking for a password reset email, check each email address associated with your Apple Account.

If you’re looking for a verification email, you can sign in to your Apple Account and review all the email addresses you have on file, including the one that you’re trying to verify.

If the email address is spelled incorrectly, you can update it and send another verification email.

Resend the email:

To resend a password reset email, repeat the steps to reset your password and a new email will be sent to your Apple Account primary email address.

To resend the verification email, sign in to the Apple Account on the web. Click Resend next to the email address that you want to verify and you’ll receive another email at that address.

Make sure that you’re getting email:

If you’re not getting any email, you might need to contact your email service provider for help. Learn what to do if you can’t send or receive email on your Mac or if iCloud mail isn’t working.

If you need more help, contact Apple Support directly.

Good Luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer