but you would rather them burn gas and oil instead

KSA has been big on solar announcements, slow on completion. The temperature coeficient of solar panels is improving, but still plenty good enough to get much better power yields/$ than nuclear. Desert climate means low enough overnight temperature even in summer. Most of the country has low humidity in summer. Solar is exceptionally well suited to its power demand. Most of the world has very fast deployment of solar. US nuclear weapons charade is going to be slow walked no matter how many RE deals Trump signs. Netanyahu still in charge, with loyal congress and State dept minions.

Nuclear energy is slow to build, and highly prone to corruption. Where US deep state, and contractors, can string along a desperate KSA to pay more for mistakes/delays, they will. You also need to stay in an energy shortage position, that burns oil/gas instead of building out renewables quickly, while the big output of nuclear is under planning/construction.