When you receive a voice message, it plays at the default speed set by the sender.
However, there are workarounds you can use to control the playback speed of voice messages on certain devices:
Android Devices: On Android devices, you can use third-party media player apps that offer playback speed control. Simply download a gbwhatsapp from the https://gbwadownload.pro/gb-whatsapp-download/ that supports audio playback speed adjustment. Then, save the voice message from WhatsApp to your device and open it with the media player app. From there, you can adjust the playback speed according to your preference.