The Z6 is the OEM Vivo's new Snapdragon 765G-powered phone. As such, it comes with dual-mode 5G in addition to 6-8GB of RAM, 44W charging and a headphone jack. It has been released onto the Chinese market via its maker's own website.
https://www.notebookcheck.net/A-new-5G-phone-the-Vivo-Z6-is-now-up-for-pre-order.455162.0.html