i cannot add debit card to my wallet, it say that this option is not supported with your apple region.

how can I solve this problem?

You have to wait.

See -> Countries and regions that support Apple Pay

Countries and regions that support Apple Pay - Apple Support (EG)

Use another payment method, see also the following Apple articles:

Change, add or remove Apple ID payment methods

Change, add or remove Apple ID payment methods – Apple Support (UK)

Add money to your Apple ID balance

Add money to your Apple ID balance - Apple Support (IN)

What you can buy with your Apple Gift Card or Apple ID balance

What you can buy with your Apple Gift Card or Apple ID balance – Apple Support (UK)