Broken UI elements in Settings App

Some UI elements (buttons, checkboxes, lists) are broken.

Spectacle is broken too.

Tried: changing themes, switching from Wayland to X11

What exactly is broken?

Are you missing qqc2-desktop-style package?

I don’t see any brokenness there, but it’s hard to tell because you’re using 3rd-party theming. The issue may be more obvious with the standard Breeze application style and icon pack.