How to Manage CloudFlare CDN
On the CloudFlare CDN cPanel page, you will find a list of all domain names related with your account (main domain, parked and addon domains). Fo the ones you have activated CloudFlare CDN service there will be a Manage button which will give you access to all management options for the chosen domain.
On the first tab, you will find all the subdomains on your SiteGround hosting account and information on whether CloudFlare CDN is activated or not for them. If you want to activate the CDN service for any of your subdomains, simply click on the Activate button next to it.