Just a small anecdote (I’m usually based in Asia); Recently I’ve been building a network analysis tool (like mtr) and I wanted to test it on macOS with IPv6 and struggled to find _anywhere_ where I could (i.e. home broadband, office, Internet cafes, mobile hotspot etc).
Of course, spinning up a cloud VM is an easy solution these days, but I was surprised at how poor the IPv6 adoption was where I live.