I am not sure whether I understood your question correctly. Perhaps the section "How do I add supplementary resources to my publication page?" in https://help.researchgate.net/hc/en-us/articles/14293005132305-How-to-add-research may be useful for you.

Hi Roger

You can add supplementary resources to your publication pages, such as datasets, raw data, negative results, and supplementary figures. To do so:

Note that once added, the file will show up as linked research on the publication page that you added it to but will be hosted on its own separate publication page. If you want to have them at the same page with the article you can add the Supplementary Data link in the Comments section of the article or create a Researchgate Spotlight mentioning the Supplementary Data link in the Add details to get others interested in your research (required) section.

Best regards

Ioannis