Please note that ResearchGate is neither a journal nor a publisher, you cannot "publish" a paper here. It is a platform for papers published in journals, or to present unpublished texts, data etc. See also "Is ResearchGate a publisher?" in https://help.researchgate.net/hc/en-us/articles/14292596164753. See this help page for instructions how to add published or unpublished research to ResearchGate: https://help.researchgate.net/hc/en-us/articles/14293005132305-How-to-add-research

Well, "to publish a review article on ResearchGate", first ensure you have an account on the platform. Once logged in, navigate to the "Add new research" section, typically found on your profile page. Select "Article" as the type of research you want to upload. You will then be prompted to provide details about your review article, such as the title, abstract, keywords, and the full text of the article itself. You can either upload a PDF of your review article or provide a link to where it is published if it is available online. Be sure to properly categorize your article and tag relevant co-authors or collaborators. After completing these steps, your review article will be accessible on ResearchGate for other researchers to read, cite, and discuss.

I wish you success in your review of articles!