At this moment, ResearchGate's automated algorithm has identified 1,033 citations of your publications in other publications. For details, see https://www.researchgate.net/profile/Sherif-Husseiny/stats/citations (visible only to you). However, this number may be an underestimation, see https://www.researchgate.net/post/Why_are_the_citation_numbers_on_ResearchGate_RG_and_Google_Scholar_GS_unmatched.
If you mean that publications are missing in your list https://www.researchgate.net/profile/Sherif-Husseiny/research: Note that ResearchGate does not automatically add all your publications. See this help page for instructions how to add published or unpublished research to ResearchGate "by hand": https://help.researchgate.net/hc/en-us/articles/14293005132305-How-to-add-research. You may also look into https://www.researchgate.net/profile/Sherif-Husseiny/stats/unconfirmed (visible only to you) whether there are some publications in ResearchGate for which you have not yet confirmed authorship, so that these have not yet attached to your profile.