The Google data strongly suggests that at this point it's probably available to a majority of home users. Corporate remains significantly worse. My employer, which paid me to do IPv6 stuff last century in a very different role, today has IPv6 for random outsiders but if you have a corporate issued laptop IPv6 is disabled and they cheerfully explained that it's "difficult" in a call this week right before I pointed out what I was paid to do and where a quarter century ago. Embarrassing for them.
Meta IIRC is one of several outfits which unsurprisingly discovered that (as a corporation) the cure is just purchasing policy. When your new Doodad vendor sells you a product that is IPv4 only instead of saying "Oh, shame, OK, set all corporate systems to IPv4-only" you point them to the line in your purchase contract which says you require IPv6 and it's not your problem it's their problem, do they want to fix it or refund you ?
