I am not able to add payment methods in Wallet

Follow these directions→Set up Apple Pay - Apple Support

And be aware of the note in that link:

Learn if your country/region supports Apple Pay. To check if your card is compatible with Apple Pay, contact your card issuer.

Try the following:

• Be sure to activate your card before attempting to add it to Apple Wallet.
• Be sure card has not expired.
• Be sure to verify all information on the card matches exactly.

—Apple Pay Support—

• Set up Apple Pay.
• Pay Participating Banks.
• Can’t add a card to Apple Wallet.

If none of those work, then try linking the payment method:

Open Settings ➢ your name at the top of the list ➢ Payment & Shipping ➢ Add Payment Method.

Once the payment method has been added, you should have the option to link it to Apple Pay.

Need more help?

• Contact Support.
• Payment Method Declined.

Good luck! 👋🏼😉