Some platforms (such as ORCID, Publons, or Scopus profiles) are only lists of your publications, which link out to the publisher's websites. Others, such as Digital Commons, allow you to upload copies of your works to share them with other researchers. Each publisher will have guidelines as to what versions of your works can be shared, and can usually be found under a section called self-archiving policies.
While most publishers have existing self-archiving policies that establish your rights as to what copies of your works you can share, you can also request that you retain certain rights by including an addendum to your copyright transfer agreement when submitting your manuscript.