[Edit #4: September 22nd, 2019]: We made clear Sprint 5G version (which was released in August 27, 2019 can't be supported.
[Edit #3: June 5th, 2019]: We just added the regular OnePlus 7 to Oxygen Updater.
[Edit #2: June 1st, 2019]: The 5G version of the OnePlus 7 Pro is now supported as well.
[Edit #1: May 28th, 2019]: Changed the minimum required app version from 2.7.3 to 2.7.4 as a critical bug fix was needed for the OnePlus 7 series.
Great news, folks!
The OnePlus 7 Pro series is now supported in Oxygen Updater!
The app supports all unlocked models. This are all devices, except Chinese devices (they run HydrogenOS) and devices bought from T-Mobile in the USA (these are locked down and you cannot install updates yourself on them).
Devices sold in Europe require an update of Oxygen Updater, to at least version 2.7.4. International devices are also supported on the previous versions of the app.
Starting with app version 2.7.5, the 5G edition (sold through EE and Elisa) is now supported as well. 5G version sold through Sprint in USA sadly can't be supported as it is locked down: you cannot install updates yourself on it.