The OnePlus 7 Pro is already definitely associated with the UFS 3.0 standard ahead of its launch on May 14, 2019. Now, the OEM has confirmed that this phone will support HDR10+ content. In ongoing leak terms, it may also have had all its colorways exposed in more detail.
https://www.notebookcheck.net/OnePlus-makes-HDR10-for-the-7-Pro-official.420233.0.html