Which coverings are suitable for an outdoor terrace?

Hello community,

first of all: I know little to nothing about this topic, which is why a company will take care of it.
At my grandparents' place, there is an outdoor terrace, half of which is covered by a balcony. Over the decades, the tiles on the balcony and the part of the terrace that is not covered have come loose due to weathering. These are the same white 25x25cm tiles (they look like tiles but with a rough anti-slip surface). Both the balcony and terrace are to be completely redone. The question that arises for me is: does it make sense in this case to use such tiles again and grout them as usual, or should one approach the matter completely differently? They do not want wood or wood imitations. Since I have no knowledge about the topic at all, I hope someone is familiar with it and knows some suitable options for what can be done here, also to permanently prevent possible water damage to the masonry.

Thanks in advance

The question that arises for me is, does it make sense in this case to use such tiles and grout them normally again, or should one approach the matter completely differently. They do not want wood or wood imitations.

If wood or plastic are ruled out, only a stone covering remains. So tiles in whatever form. Of the "few" possibilities, exactly one remains. Tiles/slabs. But since we have no idea how the terrace and balcony structure looks like, only a professional can help.

In the USA, according to relevant TV shows, people also like to use (high-quality) artificial turf. It then looks like real grass (not like the old carpet) and can apparently also be easily cleaned with a pressure washer. However, I have no experience with it. For stone, I would rather use actual stone in a gravel bed than porcelain stoneware. I don’t know if that also works on a balcony.

PS, I’m just wondering what actually defines an outdoor terrace? Are there also indoor terraces?

I like natural stone Beola outdoors. Preferably in a light gray, e.g. Maggia, or a bit darker Onsernone.