Does appgyver support multiple domains?

Hello
I spent a few days using appgyver, which helps me create a preview of the app I plan to develop.
To save time, I want to ask you guys. I can develop a sass application.
Does appgyver support multiple domains? (user will add the domain name)
Can I create multiple themes using appgyver and let users choose to use?

Can’t anyone answer my question?
I am still trying to get domain information in appgyver