What happens to my existing DNS records when I change my domain name and update Cloudflare?

Your existing DNS records will need to be recreated for the new domain name within Cloudflare. Cloudflare doesn't automatically migrate records. You'll need to manually add or import your DNS records (A, CNAME, MX, etc.) to match your new domain's configuration. Consider exporting your records from your old DNS provider before changing nameservers to make this process easier.