Apple ID verification

What is the exact message you see? There are many things that could possibly need verifying with Apple but not an Apple ID alone. We need more context.

This? --> Get a verification code and sign in with two-factor authentication - Apple Support

This? --> "Before you can make purchases, you must tap Continue to sign in, then verify your payment info."

The resolution to this issue is often making sure you have entered a credit card or other valid method of payment* even if you don't plan on needing to use it.

If there is an option to select "Review" or "Continue", select that and enter valid payment information if required. If there's problems doing this:

On a mobile device tap: Settings > [your name at the top] > Media & Purchases > View Account > Review Apple ID.

Alternatively this document explains how to 'Change, add, [review,] or remove Apple ID payment methods' on an Apple mobile device, a Mac, or a PC; click here --> https://support.apple.com/HT201266

More things to try in this 2018 post by Urquhart1244 marked Apple Recommended:

https://discussions.apple.com/thread/8434425?answerId=33542414022#33542414022

If you continue to have problems contact Official Apple Support - Select your region from the list and then your country from the pop-up window. If you do not see your country, see if there is an "other" listing for that region.

https://getsupport.apple.com/?caller=cups&PGF=PGF63005

*Payment methods that you can use with your Apple ID - https://support.apple.com/HT202631