The new version is yet to be released.
Perhaps I was confused by the following language in the email that was sent to me on March 22, 2025: “In the Local section of the audio settings of 5.2 version of the Remote app (coming next week), you can enter the folder network path of the music you want to add.”
The new version of the current app is released, but not the new app. They are working on a new app update with a different interface, at least, that what was they said in this community.