I don’t see daily savings to set up an savings account

The option you are looking for is Daily Cash.

1. On your iPhone, open the Wallet app and tap Apple Card.
2. Tap the More button , then tap Daily Cash.
3. Tap Set Up next to Savings, then follow the onscreen instructions.

click here ➜ Set up and use Savings in Apple Wallet - Apple Support

What you need to open and maintain an account

• Be an owner or co-owner of an active Apple Card account, and add Apple Card to your iPhone.
• Update to iOS 16.4 or later.
• Be at least 18 years or older.
• Have a social security number or individual taxpayer identification number.
• Be a U.S. resident with a valid, physical U.S. address.6
• Set up two-factor authentication for your Apple ID.