It may happen that a citation will never appear at ResearchGate or Google Scholar. It depends on whether it can be identified by the automated algorithms used by the platform. - But what exactly do you mean when you write that "I cited one of my article"? The 5 texts in https://www.researchgate.net/profile/Samuel-Omoleye/research do not contain citations of your own research in the lists of references. - By the way, it looks like you posted five unpublished texts. Are you aware that ResearchGate is not a journal, and posting here is not regarded as a publication? See also "Is ResearchGate a publisher?" in https://help.researchgate.net/hc/en-us/articles/14292596164753.
Dear Samuel Omoleye Part of the problem is that you did not uploaded two papers in pdf format. This is necessary to enable the RG search engine/algorithm to detect for example the references in your publications. Like for example
Article Emotional Intelligence in Machines: The Promise and Limits o...
Just change the format to pdf (when you save the file).
As indicated by Wolfgang R. Dick your publications are not peer reviewed papers so it might be better to change the research type to preprints or reports.