كيف أتقدم بطلب بطاقة آابل عندما كنت من سكان المملكة السعودية؟

It is not possible, see -> How to apply for Apple Card -> How to apply for Apple Card - Apple Support

See if you're eligible

• To be eligible to apply 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.