Ahh, okay. I know Cinnamon shows the song that’s playing if you click the little speaker in the toolbar to adjust the audio slider with the mouse. IDK if there’s a setting to make it show on the little pop-up thing in your photo, not sure if that one has options. Like the other commenter said, I’d check in the Mint forums or discord. Could be there’s a theme that has it already
Don’t stalk people. Let them live their lives