I would say Cat 6 (or at least Cat 5) has been a standard inclusion in new home and apartment builds in Australia for the past 15-20 years, in one form or another. In reality, that seldom means 1 or more ports in each of the rooms, usually it's 2 or 3 ports scattered "where ever". In more recent builds, I have seen more wall jacks appearing, which run to Krone terminal blocks, and while you could use them for Ethernet, I don't think that's the intention. Most apartment buildings here have fibre to the basement, then VDSL2 up to each unit. In newer homes, you generally see ethernet cable running to a central point, such as Clipsal's "StarServe" product (which is just a plastic cabinet mounted in/on a wall, with enough space to squeeze some basic networking gear inside).
I ran 40 ethernet cables around my house when it was being built about 10 years ago, but I think even today, unless you're a hardcore IT or technology enthusiast, that would be considered overkill in homes.
The vast majority of people don't really care about having a central switch and wiring their devices in, particularly as wireless ethernet just keeps getting better and faster. 6 GHz has already been ratified and is in-use, which opens up even more possibilities, particularly in RF congested areas.