Google Pixel 4a 5G and Pixel 5 owners tend to experience enhancements in camera quality on third-party apps like Instagram after the update.
For Google Pixel 4, the April 2021 patch update fixes the grid size customization issue while the older supported phones appear to be enhanced after the quarterly feature drop.
Camera Improvements in camera app in certain third-party apps. Devices: Pixel 4a 5G and Pixel 5
Connectivity Fix for issues causing certain devices to appear offline while connected to a VPN. Devices: Pixel 3/XL, Pixel 3a/XL, Pixel 4/XL, Pixel 4a, Pixel 4a 5G, Pixel 5
Performance Performance optimizations for certain graphics-intensive apps and games. Devices: Pixel 4a 5G, Pixel 5
System Fix for issues causing certain devices to freeze on the Google logo during startup. Devices: Pixel 4/XL, Pixel 4a, Pixel 4a 5G, Pixel 5
System UI Fix for missing home screen grid settings on certain devices Devices: Pixel 3/XL, Pixel 3a/XL, Pixel 4/XL, Pixel 4a
Moreover, the security level update tends to resolve an issue with Pixel 4 and its successors that caused them to freeze during boot. Also, it settles down the mess with Pixel 3 and its predecessors that the phones appeared offline when connected to a VPN.
Furthermore, it drives in the performance optimizations for graphic-intensive apps and games to the Pixel 4a 5G and Pixel 5.
If you own any of these Pixel devices and haven’t received the update yet, you can navigate it manually in System Settings. However, in case you have a carrier-locked device, you may have to wait a bit longer.