First of all, I hope you have root. File recovery requires direct access to storage, and that’s not possible without root. Unlocking the bootloader to gain root erases encryption keys, which will make previously deleted files unrecoverable.
I’m a little surprised a quick web search doesn’t find an Android port of PhotoRec.
I just tested DiskDigger on a device running LineageOS 20 (Android 13), and it did not find any recoverable files with a full storage scan even though I deleted several jpegs immediately before running it. The non-root deleted photos scan did find some images, but that won’t help you with audio files.