Terrace flooring for covered terrace

Which flooring should one choose for a covered terrace that is closed in winter - in other words, a [Sommergarten]?

We currently have a red paving stone under a terrace roof where no rain ever reaches. It is very prone to stains. Whether it is dropped cream cake, coleslaw, or animal remains torn apart by the tomcat - everything leaves stains that are hardly removable. This is very annoying and I want to have a better terrace flooring in the next house.

Concrete sucks. But it can also be impregnated/sealed or bought already treated. Otherwise, tiles in a frost-resistant version would be possible.