Hello, Ferdinand1804, and
You will find a list of identified compositions used in the film here:
viewtopic.php?f=81&t=212742#p763943
However, the one you're interested in doesn't appear to be identified yet (it's possibly one of the pieces composed specifically for the film).
We already have a topic on the film song "Wach' auf, du deutsches Land", see:
viewtopic.php?f=81&t=212881
Unfortunately, no (original) lyrics have surfaced yet (reminder: it's not the well-known XVI century song of the same name).
By the way, always feel free to post different questions in separate topics, it makes future browsing and cataloguing easier.
Cheers and Happy New Year,
Ivan