Is this a driveway or patio area?

@jck910 patio area 😌

How about a sail shade

Wall art: you could paint something on it

Espalier or trellis

jck910 is absolutely right about shade. Hardscape reflects heat, making the air over it hotter. It would be well worth the expense to put up a some poles and add a shade cloth tarp or two between the house and the wall. I live in a hot summer climate and put up shade cloth over my south facing deck every year. It's still light enough to grow even sun loving potted plants, but the shade extends the time this deck can be enjoyed. I would also plant a tree on this end of the concrete to shade the area. Neighborhoods with tree coverage are cooler than those that lack trees.

After you have more shade you could add planters and trellises against the wall.

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Just make sure the plants are suitable for your climate. Note, though, that every plant needs supplemental watering the first year after it is planted, and container soil tends to dry out quicker than the soil in beds. Be sure to mulch any bare soil.

The cost of large containers, which make the best impact, can be significant. I recommend you get shade/tree installed first, then look for planters. Having planters match across your yard will give continuity to the design. But, if your style is eclectic go for that, and get whatever containers fit each specific area and the type of plant you want.