Ministries have signed MoU with Saudi energy company ACWA Power.

Currently there are 76 seawater desalination plants in Egypt, that supply 831,690 cubic metres per day. The plan is to build 67 more plants, in the governorates of Matrouh, Red Sea, North and South Sinai, Ismailiyah and Suez.
https://smartwatermagazine.com/news/smart-water-magazine/egypt-looking-25-bn-finance-17-desalination-plants

All those existing plants are probably not solar-powered, right?

Plans for new, solar-powered ones: https://www.globalconstructionreview.com/egypt-plans-desalination-plants-worth-2-5bn-over-next-five-years/