If you have taken the backup of the audio files in cloud storage before they get deleted from your phone then you can easily restore them from there.
Hi @Didem877 Go to Settings-Accounts and Back Up-Samsung Cloud-Restore Data. If a back up has been taken you will be able to restore the Audio Files.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .