Why does my airpods not have a button on the back?

I’ve been using AirPods since 2019 AirPods Pro 1, AirPods 3, is the AirPods i used. They all had buttons, but when i was gonna reset my AirPods, it had no button. Why? Also the serial number is H*****Q, model number is A3057, airpods version is 6A301 and case version 70.92.0

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