I have been using Cloudflare for quite a long time.
Cloudflare provides detailed website statistics and offers various customizable settings, allowing us to make the most of this free service. Cloudflare also provide an excellent way to make content available over IPv6.
run nslookup to check the domain IP address.
Firstly, login to your Cloudflare, select your website and CloudFlare settings.
Select Full to enables IPv6 on all subdomains that are CloudFlare enabled
Run nslookup again to verify IPv6 has been enabled.