Or Spain.

We're one of the most spread out populations in Europe, and yet we have ubiquitous gigabit fibre to even the smallest of villages (I have it in a village of ~12 houses, an hour's drive from the nearest population hub), with a broad selection of providers.

Why? Because Movistar, the former national telecom, is required by law to connect the entire population to fibre, and then rent access to all their smaller competitors.

Well in the area of Sweden I live in a particular company seems to own the fibre, and then they have to allow access to resell it. The company owning the fibre has been finding interesting extra ways of charging me extra fees over the years and I don't have a choice of moving away from them (except paying for commercial fibre or using slower 5G with quotas)

Well I get your point, but Sweden has a GDP of just under a trillion. The example US state of Idaho has a GDP of about 100 billion. It really is just a quiet, no-frills, rural kind of state.