I understand that one can add a supplement to a research item that has already been published on ResearchGate. But is there a way to do the opposite?
Basically, I do not undestand how to publish a preprint with several supplements and then link them to the published version of an article as well.
I did not find any possibility to link data to more than one publication. I also do not know whether it is possible to create a data page first and then link it to a publication. I always created a publication first and then used the "Add supplementary resources" function (see "How do I add supplementary resources to my publication page?" in https://help.researchgate.net/hc/en-us/articles/14293005132305-How-to-add-research). The help page on data (https://help.researchgate.net/hc/en-us/articles/14293085867921-Data) says "You can also connect your data to your publications ...", but there seems to be no description how to do this. I recommend to contact the support team at https://www.researchgate.net/contact asking this question. Please let us know if you get an answer.