[zelphirkalt]

I think that is not really true? There is the "Gedankenstrich" and one can see it in texts. Or do you mean, that it is so rare, that German language almost does not use it? I think that depends on the writer.

[greenicon]

Yes, and the Gedankenstrich is usually set as en-dash with spaces around, only rarely as em-dash. See https://de.wikipedia.org/wiki/Halbgeviertstrich#Gedankenstri...