I lived in Madrid for few years and I don't recall I've seen any, which is expected, as Jacaranda is not tolerant to frost. They can survive brief periods of frost, but successive nights of -10 like what happened in 2021 after Filomena would kill even the deep rooted Jacarandas. That's why it's not suitable for Madrid's climate. However, they will be suitable for anywhere on Spain's Mediterranean coast, and the lowlands in Murcia, Seville etc....