In some works, there is no song name or song song name, only the file name. What formula should be written in the place with the red arrow to write the song name and the reciter.
Please tell us a real example filename and what exactly you expect to be the new song title (TITLE) and/or singer name (ARTIST).
Convert Filename -> Tag has to be very specific and exactly matching your real filename.
In general, have a look at the documentation:
I want to write the names of songs and singers that do not exist
Show us your filenames, please.
(You can copy & paste them from your Windows File Explorer.)
Example filenames
01 - ABBA - Waterloo.mp3
Bruce Springsteen Born in the USA.mp3