Hello Gerald,

Indeed. at present, there is no way to modify the border of the expansion panel when it is collapsed. The Header template only permits border manipulation of the panel's header. Our development team is exploring alternatives, such as creating a customized template, to address this issue. 

I have noted your request in our public issue repository, which you can track for updates at https://github.com/telerik/themebuilder/issues/48. 

In the meantime, as a temporary measure, you can apply styling directly via CSS in your application.

```CSS
.k-expander {
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
}
```

The Focused state is a legitimate feature that we will also prioritize. You can check its status on the GitHub thread provided at https://github.com/telerik/themebuilder/issues/49. As a temporary workaround, you can apply the styling directly through CSS in your end application.

.k-expander-header:focus, .k-expander-header.k-focus {
    background-color: red;
}

Regards,
Nick Iliev
Progress Telerik