Hover Screens lets you see and switch between desktops similar to Meta+W and Meta+G on the desktop.
It integrates with Kwin, JS updates the widget if the desktop is changed away from the widget and supports scrolling and clicking.
If size is small, it turns into a quick button to open the native Kwin Meta+g Meta+W
Optional on-hover, so it stays lightweight until needed.
/github.com/suppdiff/hover_screens