The whatsapp voice notes are notworking The voice notes are working if i hered them through whatsapp, but in storage, they are named "PTT......opus." but still arent working, the device says there is no application  to do this action, so do you have any idea how to solve this ?
The .opus format is the new audio format that WhatsApp uses to record voice notes. The previous format was .m4a. So in order to listen to your voice notes, you'll need to change the extension .opus to a supported one, such as mp3 (Your phone file explorer may not permit that, so you need to download a third party app, such as ES File Explorer on Google play.