I'd recommend checking out Asket. They have a lot of transparency. I assume that not every step of every product is within the EU, but you should be able to see it per product.
I have a pair of their normal length pants and they are probably on their 7th year. No repairs needed yet, even with around 3 wears a week. These are heavier duty than some of their other models.
I had a pair of lighter summer pants that only lasted a few years before the zipper became a problem.
I'd recommend checking out Asket. They have a lot of transparency. I assume that not every step of every product is within the EU, but you should be able to see it per product.