Submitted support request on ticket 1958463.
Updated DNS and site switch to CloudFlare today. The SSL certificate had expired so we removed the expired SSL and installed a CloudFlare origin certificate. SSL mode was set to Full/Strict, Always Use HTTPS mode has been enabled.
When visiting the site, we are still able to see the HTTP version of the site. When we try the HTTPS version of the site, we get a privacy error. Looking at the certificate details shows the CloudFlare origin certificate and that it is not a trusted certificate.
Do we just need to wait until all the certs are live or am I missing something in the settings?