The OnePlus 7 Pro users, whoever is on current Android Q Beta, will now get the Android Q Beta 2 update. This update will not be the stock Android like Pixel but is with OxygenOS for OnePlus 7 Pro devices.
This is the second preview build, so it might be less buggy than the first one. Also, there might be some more bugs in the build.
Now if you are using any Pie-based device, then you might have to wipe the entire device to install the Developer Preview of Android Q. But if you are on the first build, then you can just flash the firmware directly.
To download and install the Android Q Beta, follow the steps in this forum.