Where is the downloaded file saved on an android phone?

Does anyone know where a file downloaded via Android-NC app is saved on an Androidphone? I have downloaded an mp3 file from my NC and would now like to add this file to my playlist. However, I can’t find the file anywhere. I can only play the file directly in the NC app.

Anything downloaded using the Nextcloud app is put in a folder structure that mirrors the folders on your Nextcloud server. On my LineageOS 18.1 (Android 11), that structure starts here: