According to the screenshots, OnePlus has equipped the 9 Pro with a Snapdragon 888 SoC, which is to be expected, along with at least 8 GB of RAM and 128 GB of storage.
We imagine that the OnePlus will offer the device with 12 GB of RAM and 256 GB of storage though, as it does with the OnePlus 8 Pro.
Again, these screenshots look the part, but we will only be sure once OnePlus releases the device next month.