As part of your Whitelabel licence, you can create (or transfer) templates to your Admin Template section. These will then be available to all you clients.
First, just click on your 'Templates' section and create a new template
When creating new templates in your Admin Template section, the placeholder template that you see when you 'create new template' is just an inert placeholder - To create an active new template, you just need to click on 'load new template' in the control panel
All the library is in there.
PLEASE NOTE: If you have created a template within your personal account and wish to transfer it to your whitelabel admin account, just click on 'Save as template' within your personal campaign builder
Then when you go to create a new admin template, your custom personal template will be available in the 'My Templates' option in the menu