The new software update brings more than just a new security patch. As per the changelog for Realme X2 Pro, it fixes multiple Battlegrounds Mobile India issues including the lagging issue and 90fps support issue when it’s turned on. Realme has added fixes to heating issues while charging when the screen is on, phone restart issue in standby mode, and camera freezing issue. Similar to the Realme X2 Pro, the new update for X7 Max 5G also fixes a bunch of issues. It includes the Weather app location issue, Camera app automatic exit issue, Mobile network issue, and Bluetooth keyboard responsiveness issue.
As always, the new update for Realme X2 Pro and X7 Max 5G is rolling out in a staged fashion. So, it may take a couple of days to reach all the Indian units. You can manually check for the latest update by navigating to Settings » Software updates.
Changelog for Realme X2 Pro:
Security Updated Android security patch: July, 2021 Game Fixed the probabilistic lagging issue of Battlegrounds Mobile India in some scenes Fixed the issue that the Battlegrounds Mobile India does not support 90fps while the 90fps switch is on System Fixed the problem of heating when using normal charging while the screen is on Fixed the issue of phone restart at a very low probability in standby mode Fixed the problem of low probability of camera preview freeze
Changelog for Realme X7 Max 5G
Security Updated Android security patch: July, 2021 System Optimize system performance and improve system stability. Fixed an issue where the Weather app would fail to find your location sometimes. Fixed an issue where the Camera app would exit automatically sometimes. Fixed an issue where the mobile network would be disconnected occasionally. Fixed an issue where typing on a Bluetooth keyboard would be responsiveness.
[source 1, 2]