France is one of the few countries that do recycle spent fuel. https://www.iaea.org/newscenter/news/frances-efficiency-in-t...
France is a nuclear capable country, so the proliferation risk is fairly low from what I understand. They could even sell the plants abroad and bring the waste back to France to be recycled.
Germany is not a nuclear capable country, and I am not sure how they feel about France being their primary source of energy (or enriched uranium, if they have their own plants). Hopefully they prefer French nuclear energy to Russian oil and gas.