The press release published on February 23, 2021 by the US Department of State is somewhat perplexing. According to the note, Secretary of State Antony J. Blinken spoke with Egyptian Foreign Minister Sameh Shoukry to emphasize the importance of the strong strategic partnership between the two nations in the ongoing cooperation against terrorism, as well as raise concerns about the potential procurement of Su-35 fighter aircraft from Russia.
What is surprising is the reference to a 'potential procurement' when Russia has already started deliveries of Sukhoi Su-35 Flanker jets to Egypt. Read more here