A phone from the OEM Vivo with the model number V1821A has appeared on Geekbench. This device is likely to be the upcoming Vivo Nex 2, as it packs the Snapdragon 845 which lines up with other leaks about the phone. The phone posted a respectable result, which also revealed its 10GB of RAM.
https://www.notebookcheck.net/Possible-Vivo-Nex-2-model-with-10GB-RAM-seen-on-Geekbench.375196.0.html