Shade, even sunlight, isn't what makes death valley so hot. It is the valley part. Adiabatic cooling/heating as the air moves up and down the mountains is what makes the valley floor so hot. Take away those mountains and you loose that heat engine.
"The confluence of several topographical and geographic factors have resulted in some of Earth’s highest air temperatures. Solar heating of the desert floor, the movement of warm air from adjacent areas (known as advection), adiabatic heating as air descends the ranges west of Death Valley, and the trapping of air in the valley all contribute to scorching temperatures. "
Makes sense. I checked out Turbat, Pakistan and Kebili, Tunisia (noted for record temps) and at first glance their topography is less of a valley so some other mechanisms must be dominant there.
https://www.geographyrealm.com/geography-facts-about-death-v...
"The confluence of several topographical and geographic factors have resulted in some of Earth’s highest air temperatures. Solar heating of the desert floor, the movement of warm air from adjacent areas (known as advection), adiabatic heating as air descends the ranges west of Death Valley, and the trapping of air in the valley all contribute to scorching temperatures. "