They plan to pay for some development. Mainly in replacing Microsoft Active Directory, which has to be replaced using a number of different open source projects for different features and apparently those lack some features they really want. There are only a few large users of desktop Linux so those administration tools very much need some work.
Sort of the plan, but I am not sure what Linux distro they are using.
He got fired for refusing a 3billion€ Ukraine aid package and argued for sending Taurus instead, which also obviously would cost money. Taurus costs over a million per missile and it needs to be integrated into some aircraft Ukraine actually uses. So we are talking some serious money either way, which he refused to release. Also in the past he wanted to not send German money to Ukraine, but pay aid from the frozen Russian assets.
The main reason he got kicked out was refusing to take on debt and instead cut social spending, while the German economy has some serious problems and there is a massive war in Europe.
Governments want a stable distro, which has great general support and the option of hiring developers for additional features. If something breaks government workers can not do their jobs, so it costs money anyway. So having professional people behind it, who can be talked and fix the problem quickly is something a government really wants. In addition to that, they require some niche features, which need to be developed. In other words, they really want a stable distro with a professional team behind it and as it happens Suse is the only such company in Germany. Even better they already have experience in dealing with government agencies and well speak German. The alternatives would be CentOS or Fedora from RedHead or Ubuntu from Canonical. However those are not German or European.