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