> Can you cite a region in Europe that physically independently covers its energy needs with solar+storage alone?

That is substantially moving the goalposts - nowhere in the world has built out sufficient solar to make that claim yet. The question is whether they can get there.

If you look at the table[1] for installed solar per capita, 9 of the top 10 countries are in Europe (the odd one out is Australia), so they are definitely giving it the old college try

[1]: https://en.wikipedia.org/wiki/Solar_power_by_country