For whatever reason though, it is not visible in the folder picker of sonarr, when trying to select a recycle bin path.
After adding the trash directory, I tried restarting sonarr, and when that didn’t work, I tried rebooting the entire container. Still the same result.
The smb share is auto mounted when the container launches and trash is located within the same mount used for TV Series storage, so I know the mount and permissions are working.
Offhand I’m not sure, but we may filter out the trash folder because it’s a common reserved folder name. If you rename it to something else can you see it?
trash is excluded (special folder name under macOS it seems), garbage should show up though. Since it worked when manually entering it wasn’t anything other than it being excluded because it’s a special folder.