Never received it physical Apple Cash Card.

There is no physical Apple Cash Card.

There is a physical Apple Card (Apple's branded Mastercard credit card.) To get the physical Apple Card, first apply How to apply for Apple Card - Apple Support and after being accepted, request a physical card: Request and activate a titanium Apple Card - Apple Support

Both the Apple Cash card and the Apple Card can be added to the Apple Wallet without having a physical card.

Hi, here is an Apple Support article on how to add the Apple Cash card to your Wallet App,

https://support.apple.com/guide/iphone/use-apple-cash-iph385cf0980/ios

I hope this helps.