I was wondering if there's a way to show again the toast from the current song playing, by pressing a Key? Because I don't seem to find a way to activate it, I don't know If I missread the #8 post about displaying the songs that "are playing" or "already stopped" and are showed on the history.

If there's no way to print/show the toast again, could this post be a suggestion to add a Key that does that action?

You can't re show the toast, but you can find the history of played songs and thus the current one playing in the history tab of the jukebox which can be opened via a key binding

Could it be possible to add a key to re show the toast, in the future?

I will not