How can my preprint be linked to the peer reviewed version of the paper?

Sage and Authorea work with Crossref to link up preprints with their Version of Record. If your journal's publisher has a mechanism to deposit your published article DOI with Crossref, then a link to the published version should appear on the preprint page on  Advance a few days after your article is formally published in the journal. It will display in a box under your abstract with the heading "Peer review status: PUBLISHED".