Here's how you can add one or more domains, on top of the initial one you added when you first setup your account.
Go to https://app.clym.io/
To add additional domains to your, click on Properties from the left-hand side menu and click Add property on the top right-hand corner.
Enter the domain and choose your pricing plan.
Accept the terms and conditions and following the setup wizard to get your additional websites compliant with GDPR, CCPA and other Data Privacy regulations.