This is a paid asset, but now you can download Fast Sharpen ( Mobile , URP , VR , AR , LWRP ) Free.
Detail this asset from Unity Store: Original Link
Fast Sharpen ( Mobile , URP , VR , AR , LWRP ) v1.1 (Latest version)
“If possible, please buy the package to support the developer”
Works with Unity versions higher than 2017.1.0f
LWRP works only with Unity versions higher than 2019.1.0f1
URP works only with Unity versions higher than 2019.3.0f3
Supports Single-pass and Multi-pass VR
Fastest Solution on the market.
This package consists of the shader for applying the Sharpness on the screen. This solutionis currently the fastest Sharpen in the market. The shader was tested on the low-end mobile device in the loaded scene in order to optimize the performance and fps.
SHADERS
* Sharpen- The fastest sharpen in the Asset Store, completely optimized Sharpen effect. Runs at 45-58 FPS on a low-end mobile device(with proper settings).
NOTE!!! All the testing was made on low-end mobile device Meizu M2 Note in the scene containing:
-65 different gameObjects,
-68 different Materials,
-57 different Textures,
-1 Directional Light(realtime),
 – Free Download){kind=link}