I could not add my debit card to apple wallet

If you get the Learn More dialog box that takes you to the support

document you posted from, make sure your iPhone is set to a country

where Apple Pay is supported in Settings ➜ General ➜ Language &

Region ➜ Region. click here ➡️ Countries and regions that support Apple Pay - Apple Support

Not all debit cards will work with Apple Wallet. Contact your bank to see if their card will work with Apple Wallet. It's on them to work with Apple to use their card.