You can try the following: Go to your profile and then click Add your publication followed by Peer-reviewed type of paper. In the following window the second tab should enable you to upload your publications in a reference file (Bibtex, RIS etc.). I believe that SCOPUS enables one to export papers in one of these formats. Hope this helps.
The problem that I usually face that there are some journals that claim on their sites that they are Scopus-indexed while they aren't. On the other hand, other journals hide the facts by saying some tricks like Scopus (2020) or Scopus (2013).
For instance, one of the journals says at its main portal that it is indexed in Scopus. But I don't find it on the Scopus list. I have written many emails to them, they always ignoring me!
The attached file is an Excel sheet that contains the last updated list. You can download the last version anytime by click on "Scopus source list" from the Scopus portal: https://www.scopus.com
For more information, kindly check the link below:
Does anyone know if this option is still available in ResearchGate? I couldn't find the answer either in my profile or in the help center website. I'm interested in uploading RIS or BIBTEX files to a specific type of publication in order for the metadata to be extracted automatically.