The investment will be used to strengthen the structural reliability and security of KDE's core infrastructure, including Plasma, KDE Linux, and the frameworks underlying its communication services.
Because it wasn't obvious to me from the article, and I was trying to figure out whose sovereign tech fund it is:
The Sovereign Tech Agency is financed by the German Federal Ministry for Digital Transformation and Government Modernisation and is a subsidiary of SPRIND, the Federal Agency for Disruptive Innovation.