After the U.S., Germany is the largest donor of money and kit to Ukraine, approximately 1/3rd of what the U.S. gave under Biden. The cost of 13 soldiers hanging about in Nuuk is a footnote.
That's not how this works though. This is a tripwire. If 13 German soldiers died at the hand of the US it would cause a bit more of a reaction in Germany than sending money to Ukraine.