Cloudflare does not natively support that. The best workaround is to use Terraform to generate a configuration template of one site, make some changes to the configuration template (e.g. zone ID, account ID, etc), then apply the template to the new site. If you are new to Terraform, this process could take some time and sometimes it’s tricky to do so. If you don’t have a lot of settings (e.g. firewall rules and page rules) to replicate, it’s best to just do it manually rather than using Terraform.