Dont receive verification code to link my payment entity(gcash) to my apple id.

Hi reymond32,

The following steps address what you're describing specifically, and should provide a solution:

"Get a code from Settings on your trusted device

If you can’t receive a verification code on your trusted devices automatically, you can get one from Settings, even if your device is offline.

From your iPhone, iPad, or iPod touch

If your device is online:

1. Go to Settings > [your name].
2. Tap Password & Security > Get Verification Code.

If your device is offline:

1. Go to Settings > [your name].
2. Tap Password & Security. 
3. A message says "Account Details Unavailable." Tap Get Verification Code."

You can find these steps along with other information that may be helpful, here: Get a verification code and sign in with two-factor authentication - Apple Support

If you have followed the steps correctly and you still have the issue, let us know if you get any specific alerts or error messages when trying, as those may help us determine what might be causing the issue.

We also recommend restarting your device and keeping it updated as those steps assure you have cleared out any minor software issues and are running the most current version.

Restart your iPhone - Apple Support

Update your iPhone or iPad - Apple Support

If you still have questions, reach out to Apple Support directly, as this may require closer guidance: Get Support

Cheers!