The Gripen is not a dual-capable aircraft, meaning it isn't certified to carry nuclear weapons. This makes it a tough sell to NATO nations who must align themselves to NATO's strategic goals [0], which call for nations to contribute dual-capable aircraft. Nor is the Gripen independent from US supply chains. It uses the General Electric F414-GE-39E engine.

If you're a NATO nation looking for a non-US jet that can satisfy your dual-capable needs, your only option is the Rafale.

[0] https://www.nato.int/nato_static_fl2014/assets/pdf/2022/6/pd...