airpods pro 2, real or not?

There are no marking you can use to determine if a pair of AirPods are real or not. The Apple accessory market is huge and copying the marking on the product and the packaging are the easiest part of counterfeiting. The only way you know they are real is to purchase from Apple or Authorized Apple Seller.

Purchasing from any other source is a gamble you take. Who knows, you may have a pair of fake AirPods and still be happy with them, if not return them from where you bought them.

Where did you purchase them? As Mac Jim ID pointed out the only sure way to get authentic AirPods is to purchase them from Apple or an Apple Authorized Service Provider