Based on the naming convention, appears to be an automated filename generated by WhatsApp for an audio file. The name indicates it was received or saved on June 12, 2021 .
The digits 20210612 confirm the media was archived or created on June 12, 2021. Download AUD 20210612 WA0131 zip
If you are trying to find this specific file on your own device: Based on the naming convention, appears to be
The "AUD" prefix typically denotes a voice note or an audio track sent via WhatsApp. Based on the naming convention
If you are looking at a download for a file containing this name, here is a review of what you should know: File Content Overview