It isn't but that wasn't the point. It's that sovereignty & redundancy aren't mutually exclusive

The UK, at least, is big enough that you can have multiple regions within the same country. There's a lot of distance between Glasgow and London, for example. Maybe not enough if both are targeted with nuclear warheads, but at that point, we have bigger fish to fry I suspect.

Most European countries have enough space within the country to do that, and, for most things, except banking typically, hosting within the EU is enough, it doesn't have to be within your own country.

True on first glance.

But considering what these sovereignty rules aim to achive, and as someone mentioned, that the problem may be due to companies relying on a single region provided by a hypersclaler due to data sovereignity rules.

Then redundancy has to be considered by both the company and the rulers.