TENAA has reportedly certified a new device for Vivo. It is described as a 6.38 inch-display phone with a 4420mAh battery. The images associated with this listing show 3 rear-facing cameras and no visible fingerprint scanner.
https://www.notebookcheck.net/Vivo-now-linked-to-new-triple-camera-phone-with-in-display-fingerprint-scanner.427060.0.html