Feeling Triggered: How I Fixed Two Broken DualShock 4 R2 Triggers For Less Than A Cup of Coffee
Windows 10 - Xbox One controller triggers do not work - Microsoft Community
Fixing Playstation 4 controller with bad R2 button doesn't fully press - YouTube
PS4 Controller Triggers Not Working Properly? You Can Fix Them!
PlayStation 4 controller - R2 trigger has came off one of these little hinges (more detail in comments) : r/fixit
DATA FROG 2 Pcs Bending L2 R2 Triggers Extender Buttons Kit For PlayStation 4 PS4/PS4 Slim/PS4 Pro Game Controller Accessories|Replacement Parts & Accessories| - AliExpress
Gamepad Extender Back Button Turbo key Dualshock Adapter For Sony PS4 Controller | eBay
How to FIX BROKEN R2 + L2 Buttons on PS4 CONTROLLER (Button Replacement) - YouTube