I couldn’t find the option in my wallet for Apple card!

You may not be eligible, then. To be eligible for Apple Card-

• You must be 18 years old or older, depending on where you live.
• You must be a U.S. citizen or a lawful resident with a valid, physical U.S. address that's not a P.O. Box. You can also use a military address.
• Your device must be compatible with Apple Pay. See which devices are compatible with Apple Pay. Make sure that your device has the latest version of iOS, watchOS, or macOS.
• You must sign in on your device with your Apple ID and use two-factor authentication.
• If you have a freeze on your credit report, you need to temporarily lift the freeze to apply for Apple Card. Learn how to lift your credit freeze.
• You might need to verify your identity with a Driver License or State-issued photo ID.

If you're eligible, try doing it on the web. Go to the link I posted earlier (How to apply for Apple Card - Apple Support) and press the blue button "Apply for Apple Card"

You need to apply through here - How to apply for Apple Card - Apple Support

It'll ask you to if it needs it- just follow the prompts.