Hi,
No, right now there is no additional theme for QloApps nor there are any tools to create a theme for QloApps.
Prestashop themes will get installed on QloApps but the result will not be satisfying for you as there is a lot of difference between an e-commerce platform and hotel commerce platform.

But we can create a theme for you. Please share your requirements with us on our ticket system so that we can assist you further.
https://webkul.uvdesk.com/en/customer/create-ticket/