Are PlayStation 4 Buttons Pressure Sensitive? – Gizbuyer Guide
eXtremeRate Black 2 Pairs L2 R2 Buttons Extention Trigger for PS4 Controller, Game Improvement Adjusters Extenders for PS4 Controller JDM-030 : Video Games
PlayStation 4 controller - R2 trigger has came off one of these little hinges (more detail in comments) : r/fixit
How To Fix An R2/L2 Button That Wont Respond (READ DESCRIPTION) - YouTube