The big websites are operating on ipv6. If you want to run your own website it’s actually trivial to host it on both ipv4/ipv6 now and most good hosting providers will give you a /64 allocation.
In the UK broadband providers also are quite commonly providing IPv6 as standard (albeit the scummy ones dynamically assign a prefix, for absolutely zero reason aside from annoyance). My provider uses PD to assign a /48 even.
So, really not sure why it’s so slow going elsewhere. There’s really no reason for it now in 2025.
Windows is a strange game. It seems the only winning move is not to play.