As of 2024, the "Golden Age" of Priv development has passed. However, if you look through archives on XDA Developers, these were the standouts:
no official or widely stable custom ROMs available for the BlackBerry Priv as of 2026 Blackberry Priv Custom Rom
Since a custom ROM isn't an option, you can still optimize your device using these tips from the BlackBerry community Speed Up Animations: Developer Options and set Window, Transition, and Animator scales to to make the UI feel snappier. Clear Cached Data: As of 2024, the "Golden Age" of Priv development has passed