Presumably because those markets are difficult to break into whereas Germany can sell defense equipment to allied countries pretty easily (they don’t need to compete with China because Germany’s allies largely don’t want to be dependent on China militarily for geopolitical reasons).

Because Russia is waging open war with one of Germany's allies, and has been preparing for war against the Baltic states.

It's not like Germany is far away either. The Western edge of Ukraine is, in some places, closer to Berlin than the Western edge of Germany.