A device with the novel model number OPPO PCKM00 has appeared on the Geekbench website recently. It is described as having 8GB of RAM, the Snapdragon 675 processor and as running Android 9. This phone has attained a relatively good score for these specifications.
https://www.notebookcheck.net/New-8GB-OPPO-phone-pops-up-on-Geekbench.431292.0.html