iPhone 13 mini.

Hello balafromthrissur,

Thanks for reaching out to Apple Support Communities. It sounds like you have a question about the SIM card capability for the iPhone 13. We're happy to get you in the right direction to assist.

Details from the technical specifications page, shows the iPhone 13 and iPhone 13 mini support the following:

SIM Card

• Dual SIM (nano‑SIM and eSIM)
• Dual eSIM support
• iPhone 13 and iPhone 13 mini are not compatible with existing micro-SIM cards.

You can view the details here: iPhone 13 - Technical Specifications - Apple

You can also find more information about using Using Dual SIM with an eSIM here: Using Dual SIM with an eSIM as the article you started this post from mentions the physical Dual SIM with two nano-SIM cards is available "In China mainland, Hong Kong, and Macao, on the iPhone 12, iPhone 12 Pro, iPhone 12 Pro Max, iPhone 11, iPhone 11 Pro, iPhone 11 Pro Max, iPhone XS Max, and iPhone XR."

Cheers!