You can manually copy the certificate and key files in your panel to your personal computer to export the contents of your SSL certificate. Please be aware that there is no automated way to export your SSL certificate into a single file at this time.
On another server, only Sectigo certificates can be used. Let’s Encrypt certificates are only valid for the server to which they were issued.
In your panel, go to the Secure Certificates page.
Click the Settings icon to the right of your domain.
Your Certificate, RSA Private Key, and Intermediate Certificate can all be found on one page.
Copy to a local file on your home computer by clicking the Copy to Clipboard icon next to each.