A new leak suggests that Vivo's Y series of phones will get a new model soon. It may be called the Y50, and have an in-display selfie camera. This new device is also thought to have quad cameras and to have 6 to 8GB of RAM.
https://www.notebookcheck.net/An-upcoming-Vivo-Y-series-phone-will-have-a-punch-hole-display.459874.0.html