According to a report, Samsung Display will begin mass-producing foldable displays for Google, Vivo and Xiaomi in October 2021. The three companies will supposedly unveil foldable smartphones, including the so-called Pixel Fold, in Q4 2021. A Pixel Roll has been tipped by a lead analyst at DSCC, too.
https://www.notebookcheck.net/Details-on-a-possible-Google-Pixel-Fold-release-date-materialse-initial-Pixel-Roll-speculation-begins.544034.0.html