triangle from coolicons in Line with regular corners. polygon, delta, pyramid, play. Other styles and corners: @coolicons/<style>/<radius>/triangle with line, duocolor, duotone, fill or bulk and sharp or round. Leave out regular, like @coolicons/fill/triangle, and use @coolicons/triangle for line with regular corners.
pnpm dlx shadcn@latest add "https://coolicons.cool/r/triangle.json"