I doubt it honestly. Most people are connecting to sites like Youtube, Instagram etc., which do actually support IPv6.
It's how I get 60~80% IPv6 traffic on my home network. A great portion of it was because of my mom watching Youtube.
Even when you discount the services run by FAANG, for personal sites, Cloudflare and GitHub Pages (but surprisingly, not GitHub itself) support IPv6 and enable IPv6 support by default.