As per the official Sprint community post, A new firmware update is live for the Sprint OnePlus 7 Pro 5G devices. It carries a software version 10.0.3GM25CC that offers the both May and June 2020 security patch. Apart from the recent security patches, the update also improves the system stability and performance of the devices.

Changelog

Fixes:

Maintenance release includes May and June 2020 Android Security Updates

Manual Update Guide

So, if you’re already running the previous OxygenOs on your Sprint OnePlus 7 Pro 5G, then you can check for the software OTA update on your device for once. To do this, head over to the Settings – System – System update – Check for update. if available, you can download and install the OTA. Otherwise, you can manually do so by following our guide. Source

Sprint OnePlus 7 Pro 5G is now picking up both May and June security patches - 58