The Dimensity 1100 is an SoC MediaTek has introduced as a one-step-down option from its new flagship, the 1200. The OEM Vivo is rumored to be one of the first, if not the first, to produce a phone based on it. According to a new leak, it is called the S9 and will debut on March 6, 2021.
https://www.notebookcheck.net/Vivo-s-MediaTek-Dimensity-1100-powered-phone-is-slated-to-launch-in-March-2021.518025.0.html