Looks like Slab steps just need some sand and cement to refix them and you could make the bottom One more permanent. The wall. I’d screw some fence posts up to it (not on top) and use fence panels between them. If that’s too costly. Do the fence posts and make trellis for between them. We made our own years ago. With kiln dried timber from b&q. I’d suggest Painting the strips of wood before you make them, it’s a lot easier. Premade trellis isn’t very strong and it’s expensive.