France works together with Russia in the nuclear industry.
Also in 2023 none of the European supply came from China. Almost half came from Russia/Kazakhstan
The relationship with Niger is fragile, since Niger kicked out the remaining French troops from France post-colonial presence in West Africa. It seems Niger is instead looking towards Canada.
https://www.neimagazine.com/news/uranium-tensions-subside-in-niger/
And this only represents principal availability, without looking at the costs.