Germany will absolutely not have its own nuclear weapons in 10 years (there are already US nukes stationed in Germany, so foreign ones aren't a change in status quo).

Even for a highly industrialized nation, developing nukes is a big project, and all of the upcoming defense spending in the next few years will go to Ukraine and closing some of the gaping holes in conventional forces.

Besides, Germany still has deep-seated qualms about weapons and armed forces; while this is slowly eroding, I don't see it going as far as nuclear armament.

I find it more likely that Poland will possess nukes in ten years; they're geographically closer to Russia, spend more on defense and have more political will.