How are citation counts and RG Score calculated for indexed publications on ResearchGate, and do they include citations from non-ResearchGate sources such as Scopus or Google Scholar?
See https://help.researchgate.net/hc/en-us/sections/14292259487377-Stats for some explanations. It seems that citations are counted only from ResearchGate's own identifications in full-texts uploaded to RG, and this identificatio does not work very well. There is no connection with Scopus or Google Scholar. See also https://www.researchgate.net/post/Why_citation_score_for_author_publications_looks_different_on_Scopus_research_gate_google_scholar and my incomplete list of discussions on citation counts and missing citations therein. This is perhaps the most frequently asked question here.