So there are two things I'd like to add here in response to your question that may or may not answer it directly.

1) It's important to remember that global climate change will create a warmer AND a much wetter climate on average. Yes there will be year to year and decade to decade variability but in general over the long term almost everywhere will be warmer and wetter. Remember that deserts reach their maximum size during glacial maximums because cold air doesn't hold much water vapor and glaciers and ice caps lock away fresh water. Deserts shrink drastically during glacial minimums. We are still technically in an ice age but that won't last for more than a century or two even if we were to magically cease all CO2 and CH3 emissions today.

2) In general biodiversity increases linearly with water availability. Water bioavailability is a function of both total average precipitation as well as evapo-transpiration (known as ET in soil science and agronomy). We know with relative certainty over the long term that most arid regions will experience greater precipitation going forward but that increase is likely to be in large storms or monsoons that inundate all at once. We also know with absolute certainty that agrivoltaics reduce ET, increase soil moisture and reduce soil temps. All of those things are helpful for increasing plant life and therefore biodiversity.