apple id verification popping up

That can mean some small detail somewhere is missing.

Read the document:

Manage Apple ID settings on iPhone - Apple Support

- Make sure you are signed into your account

- Verify payment method(s) and billing address as described in Add a payment method to your Apple ID - Apple Support . Items in red have problems.

- If you're using other Apple IDs with services such as Messages or the App Store, make sure those are signed in too.

Other things to try:

- Check that there isn't an issue with Apple's servers: Apple - Support - System Status

- Try restarting your device.

- Check your software is up to date.

If you still have questions or problems:

To contact Apple, click here --> Choose your country or region - Official Apple Support

Select your country, then a product. 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.

or:

Contact Apple for support and service by telephone --> Contact Apple for support and service - Apple Support

See if adding a payment method to your Apple ID as outlined in: Add a payment method to your Apple ID - Apple Support is what they mean by "verify".

On an iPhone:

Open the Settings app.

Tap your name.

Tap Media & Purchases, then tap View Account. You might be asked to sign in with your Apple ID.

Tap Manage Payments.

Read the support article for how to do this on other platforms.