Valet drivers for the Supported Frameworks: how to use?

[toddz262]

I've formerly used MAMP PRO to develop sites locally, but in the interest of pinning sites to PHP versions, I've installed Herd on Windows 11 and moved several sites into the default parked path. Some are vanilla PHP sites, some use Kirby CMS. All seem to work fine, so far, but I'm not sure if my setup is complete...

The Sites -> General -> Preview area does render a preview of each site. But for all sites—vanilla and Kirby—when the previewer is unchecked, the area shows "BasicWithPublicValetDriver":

I gather this means that only the default driver is being loaded. But I can't find anything in the documentation explaining how to make a Kirby site, for example, use the supplied Kirby driver. And there's quite a bit of stuff in the KirbyValetDriver.php file, so I'm not sure what to make of the Kirby sites seeming to work fine without it.

Any clues appreciated!