In 2018, the EU proposed allocating €6bn to ITER, the international fusion reactor project in France. I can't find figures for the contributions from other countries, or whether the EU followed through with that.
I don't know if more money would help fusion. Maybe it just takes time to work through the issues and money won't speed up things. But if money would speed up things I would vote for that.
They're building it and it's the first of it's kind. ITER isn't stuck - the building and it's contents are going up week by week. I visited the site when it was an interesting hole in the ground, and they've done a lot more since then.
Also fun fact there's a spider that eats bats that lives in that area.
[1] https://ec.europa.eu/energy/en/topics/technology-and-innovat...