Can credit cards be added to Apple wallet?

Yes, many of us have multiple credit/debit cards in our Wallet app, as well as airline boarding passes and retail loyalty cards.

Add, use, and share boarding passes, tickets, and other passes in Apple Wallet - Apple Support

Set up Apple Pay - Apple Support

Apple Pay is not currently supported in India because of government regulations. This restriction prohibits credit cards from being added to Apple Pay.

Countries and regions that support Apple Pay - Apple Support