Tresbro Elevated Cat Hammock Bed, Hexagon Raised Cat Swing Bed for Indoor and Outdoor Use with Breathable Fabric & Anti-Slip Block, 23.6'' x 10.6'' x 12'' Pet Chair for Large to Small Kitty Cot

I had a screened patio and my cats loved to lay out on the concrete, roll around on it, all that. You might get some mesh cat beds to put out there - since they're mesh they can stay out there even if they get rained on, they'll dry super fast. This one is my favorite because the support bars are all plastic. I had one where the supports were metal and it rusted and stained the concrete. https://a.co/d/03IBTvv6