You would need to make use of virtual tags and the Additional Tagging and Reporting Tools plugin (AT&RT)
For the artist, pick a virtual tag slot and insert the following formula...$Split(<Filename>,-,1)
For the title, pick another slot and use...$Split($Replace(<Filename>,.mp3,),-,2)
Then go to your playlist and select the particular songs.
For the final step...go to the AT&RT (which when installed will be located under 'tools' in the menu bar) and use the 'copy tag' function.
Copy the (artist) virtual tag to the <Artist> field.
Likewise for the title.
I already spend hours on end on social media. Might as well spare a few of those to a greater purpose here.