Since Android 15, downloaded .ogg audio files often end up with a .ogx extension. This isn't a new format, it's caused by a MIME type mismatch between web servers (sending application/ogg instead of audio/ogg) and Android 15's updated file naming logic. The result: files like .ogg.ogx that most players can't open.
This video shows how to convert them to MP3 in seconds using ourfree online converter.
Convert OGX to MP3:
https://ogx-to-mp3.file-converter-onl...
Technical background: why Android 15 creates .ogx files:
https://file-converter-online.com/why...