The OEM Vivo is slated to launch its new X60 flagship smartphone later in November 2020. The rumor mill also has something called OriginOS to launch alongside it. It will be a new UI, at the least, which will apparently allow reverting back to an Android interface on the phones equipped with it.
https://www.notebookcheck.net/The-Vivo-X60-may-be-able-to-switch-between-its-new-OriginOS-and-Android.501816.0.html