Tactical Assault Commander (TAC) Mechanical Keypad for PlayStation®5, PlayStation®4, and PC - HORI USA
Add keyboard and mouse to Xbox and PS4 (and when you plug in your keyboard and mouse it automatically places you with keyboard and mouse players so it's fair) : r/apexlegends
Amazon.com: XIM APEX Keyboard Mouse Controller Adapter Converter for PS4 PS3 Xbox One Xbox 360