There's no shortage of EU-based NGOs focusing on tech advocacy. Any of these would fit right in: https://edri.org/about-us/our-network/?organisations-status=...

Whether they'd have something to contribute with their resources is a completely different question.

A bit of a tangent: FSF has a separate legal entity within the EU (https://fsfe.org/) which is (IMHO) way better at advocating than its American counterpart. There's also FSFI (India) and FSFLA (Latin America), but I'm unfamiliar with their work.