Unable to Add Credit/Debit to Apple Wallet in India

I’m facing an issue with adding my credit/debit card to Apple Wallet on my iPhone. I'm based in India, and when I try to add a card by clicking the "Add Card" button, the process doesn’t go through. I’ve verified the following:

1. Region Settings: My Apple ID is set to India, and I’ve checked my device’s region.
2. Card Compatibility: I’m trying to add a [Visa/MasterCard/RuPay] card from [Bank Name], which I believe should be supported in India.
3. Device: I’m using an iPhone [Model], running iOS [version].
4. Bank Support: I have confirmed with my bank that the card is eligible for Apple Pay, and it's activated for online/international transactions.
5. Other Troubleshooting: I’ve ensured that my software is up to date, and I've tried restarting my device and the Wallet app.

Despite all this, I’m still unable to add my card. Is anyone else experiencing the same issue or have any solutions? Any help would be greatly appreciated!

Thanks in advance!