Please note that you wrote to the ResearchGate community, not to the RG team. However, it is not worth writing to them because they do not have the capacity to add millions of publications by hand - the individual authors are expected to do this. See this help page ("How to add research") for instructions how to add published or unpublished research to ResearchGate: https://help.researchgate.net/hc/en-us/articles/14293005132305

First of all, you should search whether some of your publications are already there; in these cases, you just have to claim your authorship. See my reply to https://www.researchgate.net/post/How_can_I_undo_the_removal_of_recent_publications_that_belong_to_me for three search options.