I got these AirPods for Father’s Day trying to confirm if they are authentic

Here is how to Identify your AirPods - Apple Support — see what information that displays. That checks the innards.

Also check the serial number with Apple: https://checkcoverage.apple.com/ though serial numbers can be cloned.

Purchasing from reputable and established vendors, and avoiding deals too-good-to-be-true, too.