square-dashed from coolicons in Line with regular corners. dotted, selection, marquee, placeholder, draft, box, frame, area. Other styles and corners: @coolicons/<style>/<radius>/square-dashed with line, duocolor, duotone, fill or bulk and sharp or round. Leave out regular, like @coolicons/fill/square-dashed, and use @coolicons/square-dashed for line with regular corners.
pnpm dlx shadcn@latest add "https://coolicons.cool/r/square-dashed.json"